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Which of the choices below determines the direction of respiratory gas movement?
A) solubility in water
B) partial pressure gradient
C) the temperature
D) molecular weight and size of the gas molecule
E) none of the above B) partial pressure gradient
The Bohr effect describes the effect of
A) increased pH on the increased ability of oxygen to load onto hemoglobin
B) decreased pH decreasing the affinity of hemoglobin for oxygen, enhancing unloading
C) decreased pH increasing the loading of carbon dioxide onto hemoglobin
D) increased temperature decreasing the affinity of hemoglobin for oxygen
E) decreased P02 on increased ability of oxygen to load onto hemoglobin B) decreased
pH decreasing the affinity of hemoglobin for oxygen, enhancing unloading
,Which of the following characterizes the glomerular filtrate, the fluid that passes from the blood
in the glomerulus into the proximal tubule of the nephron?
A) It is clear in appearance and contains no glucose.
B) It is concentrated solution of waste products.
C) It is identical to blood plasma.
D) It is blood plasma that lacks most proteins.
E) It is whole blood D) It is blood plasma that lacks most proteins.
A renal physiologist wants to determine the rate of filtration in the glomeruli of the kidneys. The
best experimental design would be to inject a substance into the blood which
A) cannot pass through the glomerular capillaries
B) can pass through the glomerular capillaries, but is totally reabsorbed in the renal tubules
C) can pass through the glomerular capillaries and is partially reabsorbed in the renal tubules
D) can pass through the glomerular capillaries and is not reabsorbed in the renal tubules
E) none of the above D) can pass through the glomerular capillaries and is not reabsorbed
in the renal tubules
,Which of the following is not one of the four steps that a nephron uses to carry out its function?
A) filtration
B) reabsorption
C) excretion
D) selection
E) secretion D) selection
Antidiuretic hormone promotes the retention of water by stimulating
A) the active transport of water
B) the active transport of chloride
C) the active transport of sodium
D) the permeability of the collecting ducts to water
E) the permeability of the collecting ducts to sodium D) the permeability of the collecting
ducts to water
, As filtrate moves down the loops of Henle, the surrounding interstitial fluid has a _____
osmolality than the filtrate, so ______leaves(s) the filtrate.
A) higher, water
B) lesser, urea
C) higher, urea
D) lesser, water
E) lesser, water and urea A) higher, water
The more concentrated the urine that a mammal can produce, the longer are its
A) glomeruli
B) proximal convoluted tubules
C) loops of Henle
D) Bowman's capsules
E) Malpighian tubules C) loops of Henle
The part of the kidney that is least permeable to water is the walls of the