As pH goes down, a:
Solution becomes more basic
Solution’s hydrogen ion concentration decreases
Solution becomes more acidic
Solution thickens
Blood is slightly alkaline:
The respiratory and urinary systems can serve as physiologic buffer systems:
Acidosis causes:
Hyperventilation
Hypoventilation
An increase in blood pH
Increase in K+ excretion
Respiratory mechanisms are much more effective in expelling hydrogen ions than are urinary mechanisms:
Which of the following organs is considered the most effective regulator of blood carbonic acid levels:
Kidneys
Intestines
Lungs
Stomach
In renal compensation of acidosis:
H+ secretion increases; bicarbonate reabsorption increases
H+ secretion increases; bicarbonate reabsorption decreases
H+ secretion decreases; bicarbonate secretion increases
H+ secretion decreases; bicarbonate reabsorption increases
Which of the following accept H+ in water:
Acids
Bases
Salts
Sugars
Maintenance of body fluid pH is the result of:
Operation of various buffer systems
Response of respiratory system
Response of urinary system
All of the above
When normal buffer mechanisms are stressed by excessive numbers of H+ ions, which of the following will result:
Acidosis
Alkalosis
Neither of these
With each expiration, which substances leave the body?
a. CO2
b. H2O
c. O2
d. Both a and b
Which of the following substances releases H+ in water
Which of the following is NOT a buffer system:
Bicarbonate buffer system
Phosphate buffer system
Protein buffer system
NaCl buffer system
A falling blood pH and a rising concentration of carbon dioxide, both due to emphysema indicate
Carbon dioxide present In venous blood causes it to become slightly more basic than arterial blood
Chemical buffers are fast acting
An increase in blood pH above normal (alkalosis) causes hypoventilation
What happens as blood flows through lung capillaries
Carbon dioxide in blood decreases
H+ in blood decreases
pH decreases
all of these
Substances that are present in the plasma that prevent drastic changes in pH of body fluids
Buffers
Inhibitors
Accelerators
Activators
High CO2 levels in body fluids will result in the formation of carbonic acid as CO2 readily reacts with
oxygen
water
carbonic acid
carbon monoxide
sodium chloride
Which of the following describes the pH of blood
7.21-7.49
7.00-7.20
7.35-7.45
7.50-7.77
Mr. B’s plasma pH is determined to be 7.2. Which of the following might you expect to observe indicating compensation is occurring:
An increase in respiration rate
A decrease in respiration rate
No change in respiration rate
If the H+ concentration of blood increases, bicarbonate ions in the plasma act as buffers by:
Removing excess H+ from plasma
Releasing H+ into plasma
Combining with Cl- ions
None of the above
