Clicker Review Flashcards
Potassium reabsorption occurs at which of the following sites?
A. Ascending loop of henle
B. Distal convoluted tubule
C. Proximal convoluted tubule
D. Collecting duct
Proximal convoluted tubule
which of the following cells play a major role in the secretion of potassium?
A. intercalated cells
B. principle cells
C. chief cells
D. podocytes
principle cells
which of the following plays a major role in stimulating potassium excretion by kidney tubules?
a. aldosterone
b. angiotensin II
c. sodium ion
d. PTH
a. aldosterone
Approximately how much of the body’s supply of calcium is stored in bone ?
A. 1%
B. 47%
C. 78%
D. 99%
D. 99%
almost all
How much of filtered calcium is excreted by the kidneys?
1%
which of the following cells reabsorb potassium following potassium depletion?
a. intercalated cells
b. principle cells
c. chief cells
d. podocytes
a. intercalated cells
A high potassium intake would have which of the following effects on potassium excretion associated with increased renal tubular flow rate?
A. potassium excretion would increase with increased tubular flow rate
B. potassium excretion would decrease win increased tubular flow rate
C. there would be little effect
D. tubular flow rate would be decreased
A. potassium excretion would increase with increased tubular flow rate
which of the following describes a valid change in potassium distribution use to an acid base abnormality?
A. metabolic acidosis decreases extracellular K+ concentration
B. metabolic alkalosis increases extracellular K+ concentration
C. metabolic acidosis increases extracellular K+ concentration
D. Both A and B are correct
C. metabolic acidosis increases extracellular K+ concentration
True or false: Acidosis occurs when the rate of bicarbonate ion to carbon dioxide in the ECF decreases. When this change is due to a decrease in bicarbonate ion, it is called respiratory acidosis.
False
decrease in bicarbonate ion that causes this change is metabolic acidosis
The volume by which the lung and thorax increase for ea. unit of change in the transpulmonary pressure is referred to as:
a) Tidal volume
b) inspiratory pressure
c) compliance
d) transpulmonary volume
e) elasticity
compliance
During heavy exercise, blood flow through the lungs increases four to seven times than at rest. This is due to which of the following?
A) increase in number of open capillaries
B) dissension of capillaries and a doubling in the flow rate
C) increase in the pulmonary arterial pressure
D) All of the above
E) A and B only
All of the above
the Va/Q ratio is 0 under which of the following conditions
a. Va= infinity, but Q=1
b. Va = infinity, but Q= 0
c. Va = 0 but perfusion >0
d. Va > 0 but Q = 0
c. Va = 0 but perfusion >0
according to the oxygen/hemoglobin dissociation curve, an increase in blood partial oxygen pressure will have which of the following effects?
A) a decrease in bound O2
B) an increase in bound O2
C) no change in bound O2
D) there is no correlation between two variables (PO2 and amount of O2)
B) an increase in bound O2
reduction of blood flow to a portion of the lung has which of the following effects?
A) alveolar pCO2 is lowered, resulting in a constriction of the bronchi supplying that portion of the lung.
B) Alveolar pCO2 is elevated, resulting in a constriction of the bronchi supplying that portion of the lung
C) alveolar pCO2 is lowered, resulting in a dilation in the bronchi supplying that portion of the lung
D) alveolar pCO2 is elevated, resulting in a dilation of the bronchi supplying that portion of the lung
A) alveolar pCO2 is lowered, resulting in a constriction of the bronchi supplying that portion of the lung.
one gram of Hb can bind how much oxygen?
a. 19.4 mL oxygen
b. 15.4 mL oxygen
c. 3.25 mL oxygen
d. 1.34 mL oxygen
d. 1.34 mL oxygen
