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Question: 1. As we have discussed the physiology of the nephron, in which portion(s) of the nephron do we f…

1. As we have discussed the physiology of the nephron, in which
portion(s) of the nephron do we find reabsorption of sodium coupled
with permeability to water?

a. proximal convoluted tubule
b. descending limb of the loop of Henle
c. collecting duct
d. distal convoluted tubule
e. ascending limb of the loop of Henle

2.In diabetes insipidus

a. ADH secretion is too low and therefore water reabsorption is
too low.
b. ADH secretion is too high and therefore water reabsorption is
too high.
c. A combination of problems with ADH and aldosterone secretion
are the cause of diabetes insipidus.
d. aldosterone secretion is too low and therefore water
reabsorption is too low.
e. aldosterone secretion is too high and therefore water
reabsorption is too low.

3. Metabolic alkalosis would be caused by

a. overproduction of hydrochloric acid in the stomach.
b. a decrease in the secretion of hydrogen ions in the distal
convoluted tubule.
c. a tumor in the pancreas that leads to excessive bicarbonate ion
production.
d. chronic vomiting.
e. Two of the answers are correct.

4. If someone had a tumor that increased aldosterone secretion
to abnormally high levels, we would expect to see

a. increased blood sodium levels.
b. decreased interstitial fluid osmolarity.
c. increased urine volume.
d. Two of the answers are correct.
e. decreased blood pressure.

5. Renin is secreted by _____________________ in response to
______ concentration of sodium ions in the blood.

a. the adrenal cortex… low
b. granular cells… high
c. the macula densa… low
d. granular cells… low
e. the hypothalamus… low
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