Urea is excreted by?
Kidneys
Skin
Lungs
Anus
Metabollic Water excreted by
skin
Liver
Stomata
Mouth
Carbon Dioxide is excreted by
Salts are excreted by
Which of the following do animals excrete?
Oxygen
Carbon Dioxide
Urea
Water
Calcium Oxalate
Tannins
Uric Acids
Which of the following do Plants excrete?
Uric Acid
What is excretion?
Defication
Removal of Waste products from the body
Removal of waste products of metabolism from an organism
Things done on a toilet
What is egestion
Removal of waste products of metabollism from the body
Removal of the waste products of digestion from the body (usually cellulose and dietary fibres)
Removing food that you don't like to eat
why is excretion important
To provide jobs for toilet manufacturers, toilet paper companies and plumbers
To remove poisons from the body
To allow metabolic processes to continue without being interfered
Maintain salt balance
Maintain body temperatures
To provide the need for deoderant
To allow the body to accept more food
What are the criteria for a waste product remaining in a plant?
Must be useful to the plant in some way eg. Protection from herbivores
Must be beneficial to other organism
Must not harm the organism
Must be in a form that will not interfere with metabolic reactions
Must be converted
All of the following are ways in which waste materials leave a plant except
Diffusion
Leaf absession
Some just hang around for a while
Osmosis
Taken to other parts of plants (eg old xylem and fruit)
True of CO2
Leave at Night in plants (mostly)
Leave in day in plants (mostly)
Sometimes used up in photosynthesis so isnt excreted
Diffuses out of stomata
Produced in Photosynthesis
Produced in respiration
Sometimes used up in respiration so isnt excreted
Can leave lungs as expired air
Can leave lungs as inspired air
True of O2
Leave plant at night (mostly)
Leave plant in day (mostly)
May be used in photosynthesis so might not exit plant
may be used in respiration so might not exit plant
Leave animals in inspired air
Excreted from animals in expired air
smooth textured area which represents the outer layer of the kidney and consists of both convoluted tubules
Cortex
Medulla
Pelvis
Glomerulous
Expanded portion of the ureter within the kidney
Nephrons
Dark Triangular pyramidsin the kidneys containing mass of tubules, capillaries and connective tissues
Bladder
Tiny tubular structures extending through the regions of the kidney that removes waste from blood and reabsorb waste subststances
Role of the kidney
Release urine
Get rid of toxins
Get rid of excess waste
Control blood composition
Store urine
Warm up the body
Choose the option that demonstrates the order that blood travels through the nephrons
Loop of henle --> Bowmans capsule --> Proximal Convoluted Tubule --> Distal convoluted tubules-->Collecting Duct
Collecting Duct--> Bowmans capsule --> Proximal Convoluted Tubule --> Distal convoluted tubules--> Loop of Henle
\ convoluted Tubule ---> Collecting duct ---> Glomerulous---> Loop of Henle---> Bowmans capsule
Bowman's capsule --> Proximal convoluted tubule --> Loop of Henle --> distal convoluted tubules --> collecting ducts
Ultra filtration occurs in the
Renal Capsule
Loop of Henle
Collecting Duct
Convoluted Tubules
Affrent arteriole is rich in
Glucose and Amino Acids
Fatty Acids
Vitamins
Urea and Excess salts
Albumin
Goblins
In ultrafiltration, what remains in capillaries
water
Red blood cells
Glucose
Salt
Platelets
Large protein molecules
What is reabsorbed in the proximal convoluted tubule?
80% water
All glucose (in healthy people)
Useful nutrients
some mineral salts (to maintain ideal blood concentration
The distal convoluted tubule regulates salts to allow the blood to be
Slightly acidic
Perfectly Neutral
Slightly basic
Very acidic
Very Basic
ADH
means Arteriole-directing hormone
means anti-diuretic hormone
Secreted by nephrons
Regulated by osmo-receptors in hypothalmus
More of it in blood causes thrist
Controls the permeability of the wall in the DCtubing
Little in blood causes little urine to be passed
