Frage 1
Frage
The term ‘metabolism’:
Antworten
-
refers to all the chemical reactions that occur in the body
-
includes the synthesis of complex molecules from simpler ones
-
includes the breakdown of complex molecules into simpler ones
-
includes anabolism and catabolism
-
all of the above
Frage 2
Frage
Which of the following statements concerning energy storage in the body is true?
Antworten
-
most is stored in the form of ATP
-
most is stored in the form of glucose
-
most is stored in the form of fat
-
most is stored in the form of protein
-
most is stored in the form of DNA
Frage 3
Frage
The enzyme amylase is secreted by:
Frage 4
Frage
An example of absorption is the:
Antworten
-
movement of food by peristalsis
-
active transport of glucose into a villus
-
hydrolysis of a peptide into amino acids
-
release of secretin in the presence of HCL
-
c and d
Frage 5
Frage
Chewing food aids digestion by:
Antworten
-
stimulating the release of bile
-
increasing the surface area of the food
-
breaking up large protein molecules into peptides
-
breaking down carbohydrates
-
breaking down fats
Frage 6
Frage
A function of the small intestine is to:
Antworten
-
secrete bile
-
filter waste
-
make vitamins
-
absorb nutrients
-
secrete HCL
Frage 7
Frage
The main source of energy in food is:
Antworten
-
proteins
-
vitamins
-
nucleic acids
-
carbohydrates
-
lipids
Frage 8
Frage
Which of the following has the lowest pH?
Frage 9
Frage
Calcium absorption is facilitated by:
Frage 10
Frage
When parietal cells are stimulated, they secrete:
Frage 11
Frage
Secretion of HCL by the gastric parietal cells is needed for:
Antworten
-
activation of pancreatic lipases
-
activation of salivary lipases
-
activation of intrinsic factor
-
conversion of pepsinogen into pepsin
-
formation of micelles
Frage 12
Frage
Fat absorption occurs mainly in the:
Antworten
-
stomach
-
duodenum
-
terminal ileum
-
caecum
-
sigmoid colon
Frage 13
Frage
The movements of the small intestine are:
Frage 14
Frage
Where the protein hydrolysis occurs:
Antworten
-
oral cavity
-
stomach
-
small intestine
-
esophagus
-
b, and c
Frage 15
Frage
Which of the following organs or tissues is most dependent upon a constant blood supply of glucose?
Antworten
-
liver
-
brain
-
adipose tissue
-
skeletal muscle
-
cardiac muscle
Frage 16
Frage
After a fatty meal is taken, most of the fat would be:
Antworten
-
absorbed in the portal circulation and transported to the liver
-
absorbed in the portal vein and transported in the hepatic artery
-
absorbed as chylomicrons in the lymphatic system
-
absorbed as triglycerides into the portal vein and bypasses the liver
-
absorbed in the duodenum
Frage 17
Antworten
-
bile salts are the most efficient emulsifiers
-
gastric lipase is the most important
-
pancreatic lipase in the duodenum is the most important
-
digestion takes place in micelles
-
micelles attach to enterocyte receptor
Frage 18
Frage
Gastric acid secretion is decreased by:
Frage 19
Frage
Release of which one of the following increases the pH of duodenal contents?
Frage 20
Frage
In the small intestine, glucose is absorbed:
Antworten
-
passively
-
by secondary active transport (coupled to Na transport)
-
by facilitated diffusion
-
by co-transport with chloride
-
actively by insulin dependent uptake
Frage 21
Frage
After ingestion of a meal:
Antworten
-
digestion of fat and carbohydrate begins in the mouth while protein digestion begins in the stomach
-
carbohydrates are digested in the mouth and proteins in the stomach
-
proteins are digested in mouth and fats and carbohydrates in stomach
-
most fluid and electrolytes are absorbed in the large bowel
-
composition of the food has no effect on transit time through the bowel
Frage 22
Frage
Calcium uptake in the intestine:
Antworten
-
is passive
-
requires a carrier protein on the mucosal side
-
is by facilitated diffusion
-
is less than 10% of dietary intake
-
is facilitated by phosphate
Frage 23
Frage
Which one of the following is a water soluble vitamin?
Antworten
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vit. A
-
vit. B
-
vit. D
-
vit. E
-
vit. K
Frage 24
Frage
In the duodenum in response to acidic chyme is released:
Antworten
-
cholecystokinin
-
gastrin
-
secretin
-
peptide
-
amylase
Frage 25
Frage
In the GI tract. the layer, responsible for absorption and secretion is:
Antworten
-
mucosa
-
submucosa
-
muscularis
-
serosa
-
adventitia
Frage 26
Frage
The digestive enzyme, produced in the salivary glands and the pancreas is:
Antworten
-
maltase
-
amylase
-
pepsin
-
nuclease
-
lipase
Frage 27
Frage
This keeps the chyme in the stomach until it reaches the right consistency to pass into the small intestine:
Antworten
-
esophageal sphincter
-
Intrinsic sphincter
-
cardiac sphincter
-
pyloric sphincter
-
duodenal sphincter
Frage 28
Frage
Most of the chemical and mechanical digestion is carried out within:
Antworten
-
pylorus
-
fundus
-
stomach
-
large intestine
-
small intestine
Frage 29
Frage
Parietal cells secrete:
Antworten
-
serotonin
-
mucus
-
pepsinogen
-
hydrochloric acid
-
gastrin
Frage 30
Frage
The cells at the base of fundic or oxyntic glands are:
Antworten
-
chief cells
-
G cells
-
enteroendocrine cells
-
goblet cells
-
parietal cells
Frage 31
Frage
The chyme movement and flow into the stomach is controlled by:
Frage 32
Frage
The function of the ileum is to:
Antworten
-
absorb nutrients
-
absorb vitamin B12 and bile salts
-
introduce bile and pancreatic juices
-
absorb alcohol and aspirin
-
all of the above
Frage 33
Frage
Gastrointestinal hormones:
Antworten
-
are secreted by exocrine glands of the gut mucosa and affect metabolism
-
are secreted into the blood stream by specialised cells in the gut walls and modulate its motor and secretory activity
-
are secreted by the gastric walls and protect the gut mucosa from the effect of HCL and proteolytic enzymes
-
are situated in the epithelial intestinal cells (enterocytes) and control the cell metabolism of nutrients
-
are secreted by the gastric walls and colon and protect the gut mucosa from the effect of HCL and proteolytic and nucleic enzymes
Frage 34
Frage
The gastrointestinal enzymes;
Antworten
-
are situated in the epithelial cells (enterocytes) and control cell metabolism
-
are secreted into the blood stream by specialized cells in the gut walls and modulate its motor and secretory activity
-
are secreted by exocrine glands of the gut mucosa and break down nutrients
-
are secreted by the gastric walls and protect the gut mucosa from the effect of HCL and proteolytic enzymes
-
are secreted by the gastric walls into the small intestine and protect the gut mucosa om the effect of HCL, proteolytic and nucleic enzymes
Frage 35
Frage
Which enzymes are secreted with the gastric juice:
Antworten
-
pepsinogene and lipase
-
pepsinogene, tripsinogene and maltase
-
pepsinogene, lipase and HCL
-
protcolytic, lipolytic and amylolytic enzymes
-
protcolytic, nucleolytic, lipolytic and amylolytic enzymes
Frage 36
Frage
Which enzymes are secreted with the pancreatic juice:
Antworten
-
lipolytic: lipase and esterase
-
proteolytic: trypsinogen, chymotrypsinogen, elastase, carboxypeptidase, etc
-
amilolitic: amylase, maltase, sacharase, lactase
-
nucleic: RNA-ase and DNA-ase
-
all of the above
Frage 37
Frage
The enzymes, secreted with the intestinal juice are:
Antworten
-
exopeptidases, lipase, maltase, nucleic (nuclease, nucleotidases, nucleosidases)
-
endo- and exopeptidases, esterase and amylolytic enzymes
-
aminopeptidase, dipeptidase, nuclease and llpase
-
aminopeptidase, dipeptidase, nuclease, somatostatin, secretin, cholecystokinin-pancreozimin
-
trypsinogen, chymotrypsinogen, elastase and lipase
Frage 38
Frage
Which of the bile components are important for digestion:
Antworten
-
secretin and hepatocrinin
-
bile salts, phospholipids, cholesterol
-
acid phosphatase, secretin and hepatocrinin
-
proteolytic, lipolytic and amylolytic enzymes
-
cholecystokinin-pancreozimin and hepatocrinin
Frage 39
Frage
The humoral factors inhibiting gastric motility are:
Antworten
-
Gastrin
-
GIP, catecholamines, secretin, somatostatin, cholecystokinin-pancreozimin
-
Secretin and cholccystokinin-pancreozimin
-
Gastrin and motilin
-
Intestinal hormones, somatostatin, secretin and cholecystockinin-pancreozimin
Frage 40
Frage
The humoral factors stimulating gastric motility are:
Antworten
-
Catecholamines, secretin, gastric peptide, somatostatin, cholecystokinin-pancreozimin
-
Secretin and cholecystokinim-pancreozimin
-
Motilin and gastrin
-
GIP, VlP, somatostalin, secretin and cholecystokinin-pancrezimin
-
Gastrin, histamine, secretin
Frage 41
Frage
The humoral factors that stimulate intestinal motility are:
Antworten
-
catecholamines and intestinal hormones
-
secretin and hepatocrinin
-
secretin, cholecystokinin-pancreozimin, GlP, VIP, substance P and bombesin
-
intestinal hormones
-
gastin, secretin, cholecystokinin-pancreozimin and hepatocrinin
Frage 42
Frage
The humoral factor's that inhibit gastric secretion are:
Antworten
-
Gastrin, histamme, acetylcholine, cholecystokinin-pancreozinin, bombesin, motilin
-
Secretin, cholecystokinin-pancreozimin, somatostatin, catecholamines
-
GIP, secretin, cholecystokinin-pancreozimin, VIP, enterogastrone
-
Enkephalines, endorphines, angiotensinogens
-
Corticoglomerolotropin, prolactin, substance P
Frage 43
Frage
Which humoral factors stimulate gastric secretion:
Antworten
-
Secretin, cholecystokinin-somatostatin
-
Secretin, cholecystokinin-pancreozimin, histamine, acetylcholine, bombesin,motilin, meat and vegetable extracts
-
VIP, somatostatin, GIP, cholecystokinin-pancrcosimin
-
Corticoglomerulotropin, prolactin, substance P
-
Gastrin, histamine, secretin
Frage 44
Frage
The physiological effect of gastrin on gastric secretion is:
Antworten
-
increased amount of gastric juice of low acidity and high proteolytic activity
-
to decrease the amount of gastric juice
-
decreased amount of gastric juice of high acidity and low proteolytic activity
-
increased amount of gastric juice of high acidity and low proteolytic activity
Frage 45
Frage
The physiological effect of histamine on gastric secretion is:
Antworten
-
increased amount of gastric juice of high acidity and low proteolytic activity
-
to decrease the amount of the gastric juice
-
increased amount of gastric juice of low acidity and high proteolytic activity
-
increased amount of gastric juice of high acidity and high proteolytic activity
Frage 46
Frage
The humoral factors that stimulate the formation and secretion of bile are:
Antworten
-
angiotensin, thyroxine, somatostatin
-
glucagon, calcitonin, VIP
-
secretin, gastrin, cholecystokinin-pancreozimin, bile salts
-
catecholamines, glucagon, calcitonin, VIP
-
alkaline and acid phosphatase
Frage 47
Frage
The humoral factors that inhibit the formation and secretion of bile are:
Antworten
-
secretin, gastrin, cholecystokinin-pancreozimin, acetylcholine
-
catecholamines, no
-
alkaline and acid phosphatase
-
angiotensin, tiroxin, somatostatin
-
insulin, glucagon, cathecholamines, growth hormone, glucocorticoids, thyroid hormones
Frage 48
Frage
The humoral factors that stimulate the secretion of pancreatic juice are:
Antworten
-
glucagon, calcitonin, somatostatin
-
tripsin, amilase, lipase
-
secretin, cholecystokinin-pancreozimin, gastrin, serotonin, VlP, insulin
-
somatostatin, GIP
-
glucagon, insulin, catecholamines, growth hormone, glucocorticoids, thyroid hormones
Frage 49
Frage
The carbohydrates are absorbed as:
Antworten
-
mono- and disaccharides
-
glucose and glycogen
-
monosaccharides - pentoses and hexoses
-
glucosamines
-
glucose, glycogen, glucosamine
Frage 50
Frage
The hormones regulating carbohydrate metabolism (synthesis, catabolism) are:
Antworten
-
androgenes, estrogenes, progesteron, adrenoglomerulotropin
-
insulin, glucagon, catecholamines, growth hormone, glucocorticoids (ACTH), T3 and T4 (TTH)
-
somatostatin, bombesin, gastrin, histanime, kinins
-
glucagon, calcitonin, somatostatin, calecholamines, serotonin
-
catecholamines, glucagon, dehydroepiandroserone, somatotropin
Frage 51
Frage
The hormones that increase significantly the basic metabolic rate are:
Antworten
-
Insulin and glucocorticoids
-
Glucagon and parathyroid hormone
-
Testosterone and estrogens
-
T3, T4, catecholamines and glucocorticoids
-
Insulin and growth hormone
Frage 52
Frage
Glucose enters the blood stream via:
Antworten
-
absorption in the mouth
-
gluconeogenesis in the skeletal muscles
-
enterocytes' absorption, liver glycogen catabolism, hepatocytes and kidneys gluconeogenesis, renal proximal tubule
epitheliocytes
-
degradation of glycogen in the skeletal muscles
-
glucogenolisis in the hepatocytes
Frage 53
Frage
The basal metabolic rate is the energy consumption of the body under the following conditions:
Antworten
-
adequate intake of vitamins regulating the intermediate processes of metabolism of the various substances
-
normal function of the endocrine glands
-
physical and psychic rest, 12 hours after the last meal in a room at a temperature of 20-22°C
-
during physical activity
-
during sleep, pregnancy or lactation
Frage 54
Frage
The chief cells of the stomach glands secrete:
Frage 55
Frage
The humoral and pharmacological factors inhibiting salivary secretion are:
Antworten
-
catecholamines
-
cholinolytics
-
adrenominetics
-
catecholamines, cholinolytics, adrenomimetics
-
adrenolytics and cholinomimetics
Frage 56
Frage
Humoral factors taking part in the calcium/phosphorus homeostasis are:
Antworten
-
parathyroid hormone and thyroxin
-
parathyroid hormone, thyrocalcitonin and vitamin D3
-
thyrocalcitonin and epinephrine
-
thyrocalcitonin and aldosteron
-
antidiuretic hormone, androgens and angiotensin II
Frage 57
Frage
The body requires amino acids to:
Frage 58
Frage
Which of the following will catalyze the breakdown of starches?
Antworten
-
protease
-
amylase
-
lipase
-
sucrase
-
peptidase
Frage 59
Frage
Which molecule represents the storage form of glucose in the liver?
Antworten
-
glycogen
-
glucagon
-
disaccharide
-
lactic acid
-
carbonic acid
Frage 60
Frage
As far as bile is considered:
Antworten
-
contains enzymes required for the digestion of fat
-
contains unconjugated bilirubin
-
bile salts make cholesterol more water-soluble
-
pigments contain iron
-
becomes more alkaline during storage in the gallbladder
Frage 61
Antworten
-
from different salivary glands has a similar composition
-
contains enzymes essential for the digestion of proteins
-
has less than half the ionic calcium level of plasma
-
has more than twice the iodide level of plasma
-
has a pH between 5 and 6
Frage 62
Frage
Swallowing is a reflex which:
Antworten
-
has its reflex centres in the cervical segments of the spinal cord
-
is initiated by a voluntary act and includes inhibition of respiration
-
has its reflex centres in the thoracic segments of the spinal cord
-
is not dependent on intrinsic nerve networks in the esophagus
-
is more effective when the person is lying down rather than when standing
Frage 63
Frage
Appetite for food is increased:
Antworten
-
by the secretion of cholecystokinin
-
by the secretion of calcitonin
-
when the stomach is distended
-
the stomach is denervated
-
the environment is cold
Frage 64
Frage
Secretion of saliva increases when;
Antworten
-
atropine is applied
-
the month is flushed with fluids with a pH of about 7
-
the subject thinks of unappetizing food
-
epinephrine is applied
-
the saliva glands parasympathetic nerve supply is stimulated
Frage 65
Frage
Defecation is a reflex action:
Antworten
-
that is coordinated by reflex centres in the sacral cord
-
whose afferent limb carries impulses from stretch receptors in the colon
-
whose efferent limb travels mainly in sympathetic autonomic nerves
-
which is more likely to be initiated just before a meal than just after it
-
which can be unvoluntarily inhibited or facilitated
Frage 66
Antworten
-
pH rarely falls below 4.0
-
pepsinogen is converted to pepsin by hydrochloric acid
-
ferrous iron is reduced to ferric iron by hydrochloric acid
-
acid secretion is inhibited by pentagastrin
-
there is a rise in the bacterial count after histamine H1 receptor blockade
Frage 67
Frage
Intestinal juice contain:
Antworten
-
potassium in a concentration similar to that in extracellular fluid
-
enzymes that are released when the vagus nerve is inhibited
-
enzymes that hydrolyze disaccharides
-
enzymes that hydrolyze monosaccharides
-
enzymes that suppress pancreatic proteolyic enzymes
Frage 68
Frage
Pancreatic secretion:
Antworten
-
in response to vagal stimulation is copious, rich in bicarbonate but poor in enzymes
-
in response to acid in the duodenum is scanty but rich in enzymes
-
to response to secretin secretion is low in bicarbonate
-
contains enzymes that digest neutral fat to glycerol and fatty acids
-
contains enzymes that convert disaccharides to monosaccharides
Frage 69
Frage
The liver is the principal site for:
Antworten
-
synthesis of plasma albumin
-
synthesis of plasma globulins
-
synthesis of vitamin B12
-
storage of vitamin C
-
activation of some polypeptide hormones
Frage 70
Antworten
-
is secreted when the vagus nerves are stimulated
-
is secreted in vagotomized animals when food IS chewed but not swallowed
-
activates the digestive enzymes secreted with saliva
-
digests the gastric mucosa because it is not protected by a pepsin inactivator
-
does not imitate the oesophageal mucosa if regurgitated from the stomach
Frage 71
Frage
The respiratory quotient:
Antworten
-
is the volume of 02 consumed to the volume of CO2 produced ratio
-
depends essentially on the type of substrate being metabolized and is 1.0 when the substrate is glucose
-
is 1.0 in conditions of metabolic alcalosis
-
is between 0.9 and 1.0 in the second week of fasting
-
is above 0.8 if fats are mainly metabolized
Frage 72
Frage
Oxygen consumption tends to increase when the:
Antworten
-
concentration of oxygen in inspired air rises
-
metabolic rate falls
-
body temperature rises and environmental temperature falls
-
environmental temperature increases
-
before a meal is ingested
Frage 73
Antworten
-
relatively more abundant in adults than in infants
-
richer in mitochondria than ordinary fat and has an extensive sympathetic innervation
-
produces less heat and more ATP than other tissues
-
stimulated to generate more but when its parasympathetic nerve supply is stimulated
-
less important than shivering in neonatal thermoregulation
Frage 74
Antworten
-
is the relationship between the body's nitrogen intake and nitrogen loss
-
is usually negative in childhood
-
becomes more positive when dietary protein is decreased
-
becomes positive whenever a single essential amino acid is omitted from the diet
-
becomes less negative in the final stages of fatal starvation
Frage 75
Frage
The normally innervated stomach:
Antworten
-
is stimulated to secrete gastric juice when food is chewed, even if it is not swallowed
-
secrete HCL when its H1- histamine receptors are blocked
-
increases gastric secretion when there are fear and depression
-
empties slower than the denervated stomach
-
is stimulated to secrete gastric juice by the hormone secretin
Frage 76
Frage
The passage of acidic gastric contents to the duodenum may cause:
Antworten
-
copious secretion of pancreatic juice rich in bicarbonate
-
increased gastric motility
-
relaxation of the gallbladder
-
contraction of the sphincter of Oddi
-
inhibition of pancreozymin secretion
Frage 77
Antworten
-
derived from cholesterol, are the only constituents of bile necessary for digestion
-
have a characteristic molecule, being water-soluble
-
are reabsorbed mainly in the upper small intestine
-
increase surface tension
-
are absorbed in the colon
Frage 78
Frage
The specific dynamic action of food:
Antworten
-
is the decrease in metabolic rate that results from ingestion of food
-
persists for about an bout after a meal is ingested
-
is due to the additional energy expended in digesting and absorbing the food
-
results in about 30 per cent of the may value of ingested protein being unavailable for other purposes
-
results in about 20 per cent of the energy value of ingested fat and carbohydrate being unavailable for other purposes
Frage 79
Frage
Secretion of gastric juice:
Antworten
-
decreases when food stimulates mucosal cells in the pyloric region
-
is associated with a decrease in the pH of venous blood during the stomach
-
in response to food is increased after vagotomy
-
is essential for carbohydrate digestion
-
is essential for absorption of vitamin B12
Frage 80
Frage
In the small intestine:
Antworten
-
the enzyme concentration in intestinal juice is higher in the ileum than in the jejunum
-
vitamin B12 is absorbed mainly in the jejunum
-
water absorption is independent on the active absorption of sodium and glucose
-
absorption of calcium occurs mainly in the terminal ileum
-
glucose absorption is dependent on sodium absorption
Frage 81
Frage
The cells of the liver:
Antworten
-
help to maintain the normal blood glucose level
-
deaminate amino acids to form NH4+ which is excreted as ammonium salts in the urine
-
synthesize Vitamin D3 (cholecalciferol)
-
manufacture most of the immune globulins
-
activate steroid hormones manufactured in the gonads
Frage 82
Frage
Absorption of dietary fat:
Antworten
-
can only occur after the neutral fat has been split into glycerol and fatty acids
-
does not depend on their size
-
is impaired when bile salt reabsorption is prevented by resection of the terminal ileum
-
is carried out by passive diffusion
-
is greatest in the lower parts of the small intestine
Frage 83
Antworten
-
carbohydrate, metabolized in the body, yields more energy when oxidized in a bomb calorimeter
-
fat, metabolized in the body, yields no per cent more energy than 1g of carbohydrate
-
protein, metabolized in the body, yields the same energy as when oxidized in a bomb calorimeter
-
carbohydrate, metabolized in the body, yields about the same energy as 1g of protein
-
protein per kg body weight is not the adequate daily protein intake for a sedentary adult
Frage 84
Antworten
-
can be absorbed from the gut by intestinal lymphatics following its incorporation into chylomicrons
-
can be synthesized in the spleen
-
in the diet comes mainly from vegetable sources
-
is eliminated from the body mainly by metabolic degradation
-
is a precursor of adrenal medulla hormones
Frage 85
Frage
Free (non-esterified) fatty acids in plasma:
Antworten
-
are provided to fat cells and other tissues by chylomicrons and VLDL
-
are bound to albumins
-
decrease when the level of blood adrenaline rises
-
can be metabolized to release energy in smooth muscle
-
are not synthesized in the fat depots where they are stored
Frage 86
Frage
lmpaired intestinal absorption of:
Antworten
-
iron occurs frequently following removal of most of the stomach
-
iodine leads to a reduction in size of the thyroid gland
-
water occurs in infants who cannot digest lipids
-
calcium may occur following removal of the terminal ileum
-
bile salts may occur following resection of the stomach
Frage 87
Frage
Peptic ulcer pain is typically relieved by:
Antworten
-
raising the pH of the fluid bathing the ulcer and a drug blocking the gastric proton pump
-
a drug decreasing the pH
-
H2 stimulators
-
a drug which interferes with the action of acetylcholinesterase
-
a drug which stimulates the gastric proton pump
Frage 88
Frage
Fat stores In the adult:
Antworten
-
make up less than 5% of average body weight
-
make up a smaller percentage of body weight in women than in men
-
release fatty acids when there is increased sympathetic nerve activity
-
release fatty acids when insulin is injected
-
enlarge by increasing the number of adipocytes they contain
Frage 89
Frage
Metabolic rate can be estimated from measurements of:
Antworten
-
total heat loss
-
the calorific value of the food consumed m the previous 24 hour
-
oxygen consumption and the respiratory quotient
-
carbon dioxide production and the respiratory quotient
-
c and d
Frage 90
Frage
Complications that may arise after total gastrectomy include
Antworten
-
depletion of vitamin B12 stores in the liver
-
malabsorption of fat due to rapid intestinal transit
-
impaired defaecation due to loss of the gastrocolic reflex
-
inability to digest protein
-
a and b
Frage 91
Frage
Severe diarrhoea causes a decrease in:
Antworten
-
body potassium
-
antidiuretic hormone level
-
extracellular fluid volume
-
total vascular peripheral resistance
-
a and b
Frage 92
Antworten
-
a mixture of colourless compounds also known as stercobilinogen
-
formed in the reticuloendothelial system from bilirubin
-
absorbed from the intestine
-
excreted mainly in the urine
-
a and c
Frage 93
Frage
Surgical removal of 90 % of the small intestine may cause a decrease in:
Antworten
-
the fat content of the stools
-
bone mineralization (osteomalacia)
-
extracellular fluid volume
-
blood haemoglobin level
-
body weight
Frage 94
Frage
Lack of pancreatic juice in the duodenum may lead to:
Antworten
-
the presence of undigested meat fibres in the stools
-
an increase in the fat content of the films
-
a decrease in the fat of the faeces
-
a high prothrombin level in blood
-
a and b
Frage 95
Antworten
-
acid secretion in response to a lowered blood gugar is mediated by the hormone gastrin
-
emptying is facilitated by sympathetic nerve activity
-
acid secretion increases when histamine H2 , muscarinic M1 or gastrin receptors are activated
-
acid secretion is inhibited by the presence of food In the duodenum
-
c and d
Frage 96
Frage
Constipation is a recognized consequence of:
Antworten
-
psychological stress
-
abnormality of the autonomic nerve supply to the esophagus
-
a diet that leaves little unabsorbed residue in the gut
-
over-activity of the thyroid gland as in thyrotoxicosis
-
a and c
Frage 97
Frage
Absorption of glucose by intestinal mucosal cells:
Antworten
-
relies on a carrier mechanism in the cell membrane
-
is blocked not by the same agents that block renal reabsorption of glucose
-
is enhanced by blockade of active sodium transport in the cells
-
takes place mainly in the ileum
-
does not involve the same carriers that are used for the absorption of galactose
Frage 98
Frage
Muscle tone in the lower oesophagus is:
Antworten
-
lower than tone in the middle oesophagus
-
a major factor in preventing heartburn
-
increased in pregnancy
-
decreased by gastrin
-
increased by anticholinergic drugs
Frage 99
Frage
Which of the following are incorrectly paired:
Antworten
-
pancreatic alpha amylase-starch
-
elastase-tissue rich in elastin
-
renin-coagulated milk
-
enteropeptidase-trypsinogen
-
phospholipase A2-phospholipids
Frage 100
Frage
All are GIT hormones except:
Antworten
-
cholecystokinin
-
gastrin
-
secretin
-
erythropoietin
-
somatosmin
Frage 101
Frage
Iron Is absorbed in:
Antworten
-
stomach
-
duodenum
-
jejunum
-
ileum
-
colon
Frage 102
Frage
in infants, defecation often follows a meal. The cause of colonic contractions in this situation is:
Frage 103
Frage
Which of the following has the highest pH:
Frage 104
Frage
Man is unable to digest:
Antworten
-
dextrin
-
glucose
-
cellulose
-
glycogen
-
maltose
Frage 105
Frage
Steatorrhoea may be cooled by all factors except:
Frage 106
Frage
Normal swallowing is dependent on the integrity of the:
Frage 107
Frage
Secretion of the intrinsic factor occurs in
Antworten
-
parietal cells of the stomach
-
chief cells of the stomach
-
upper abdomen
-
alpha cells of pancreas
-
cells of the parotid gland
Frage 108
Frage
In which of the following is absorption of water greatest:
Antworten
-
colon
-
jejunum
-
duodenum
-
stomach
-
mouth
Frage 109
Frage
Secretin is released by:
Antworten
-
acid in duodenum
-
acid in stomach
-
cells in the liver
-
distention of colon
-
gallbladder
Frage 110
Frage
Vit D is essential for normal:
Antworten
-
Fat absorption
-
Ca absorption
-
ADH secretion
-
Protein absorption
-
Glucose absorption
Frage 111
Frage
Gastrin secretion is increased by:
Frage 112
Frage
Saliva is responsible for all except:
Antworten
-
deglutition
-
dental cares prevention
-
complete digestion of proteins
-
the concentration of iodine
-
maintaining the oral pH at about 7.0
Frage 113
Frage
Carbonic anhydrase has a role to play in the formation of: