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Biol 252 Module 4 Questions and Answers with Complete
Solutions UPDATED!!!
How and where does ADH work? - ANSWER Released from
posterior pituitary, works in collecting duct, inserts aquaporins
into membrane for water reabsorption.
How and where does aldosterone work? - ANSWER Secreted by
adrenal cortex, works in distal tubule and collecting duct,
increases Na⁺ reabsorption.
How are anal sphincters controlled? - ANSWER Internal
sphincter is involuntary (smooth muscle), external sphincter is
voluntary (skeletal muscle).
How does ANP hormone decrease blood pressure? - ANSWER
Released from atria when stretched, inhibits renin and
aldosterone, increases Na⁺ and water loss in urine, causes
vasodilation.
How does blood pressure affect GFR? - ANSWER High BP
increases GFR; low BP decreases GFR.
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How is glucose reabsorption accomplished? - ANSWER Through
secondary active transport using Na⁺-glucose cotransporter.
What are myogenic mechanisms that restore GFR? - ANSWER
Automatic constriction/dilation of afferent arteriole to maintain
stable filtration.
What are peritubular capillaries? - ANSWER Capillaries that
surround the proximal and distal tubules, reabsorbing nutrients
and water.
What are the duodenal hormones? - ANSWER Secretin
(stimulates bicarbonate), CCK (stimulates pancreatic enzymes
and bile release).
What are the effects of angiotensin II? - ANSWER Strong
vasoconstrictor, stimulates aldosterone release (Na⁺
reabsorption), stimulates ADH release (water reabsorption),
stimulates thirst.
Biol 252 Module 4 Questions and Answers with Complete
Solutions UPDATED!!!
How and where does ADH work? - ANSWER Released from
posterior pituitary, works in collecting duct, inserts aquaporins
into membrane for water reabsorption.
How and where does aldosterone work? - ANSWER Secreted by
adrenal cortex, works in distal tubule and collecting duct,
increases Na⁺ reabsorption.
How are anal sphincters controlled? - ANSWER Internal
sphincter is involuntary (smooth muscle), external sphincter is
voluntary (skeletal muscle).
How does ANP hormone decrease blood pressure? - ANSWER
Released from atria when stretched, inhibits renin and
aldosterone, increases Na⁺ and water loss in urine, causes
vasodilation.
How does blood pressure affect GFR? - ANSWER High BP
increases GFR; low BP decreases GFR.
, 2|Page
How is glucose reabsorption accomplished? - ANSWER Through
secondary active transport using Na⁺-glucose cotransporter.
What are myogenic mechanisms that restore GFR? - ANSWER
Automatic constriction/dilation of afferent arteriole to maintain
stable filtration.
What are peritubular capillaries? - ANSWER Capillaries that
surround the proximal and distal tubules, reabsorbing nutrients
and water.
What are the duodenal hormones? - ANSWER Secretin
(stimulates bicarbonate), CCK (stimulates pancreatic enzymes
and bile release).
What are the effects of angiotensin II? - ANSWER Strong
vasoconstrictor, stimulates aldosterone release (Na⁺
reabsorption), stimulates ADH release (water reabsorption),
stimulates thirst.
