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Biol 373 Unit 4c and 4d Questions with
Detailed Verified Answers
Water loss can be caused be urine, but also: Ans:
Feces, sweat and lungs
Thirst is Ans: a behavioural mechanism for
compensation of water loss
Can kidneys restore lost water? Ans: No. Kidneys can
conserve water but not restore.
Osmolarity of the __ indicates how much water is being
excreted by the kidneys. Ans: Urine
Diuresis is Ans: increased urine production
Diuretics Ans: Increase the amount of urine produced
and is usually a drug
Water can __ through the lipid bilayer in most cells but
this movement is slow. Ans: leak
To conserve water, should one take a diuretic or an
antidiuretic? Ans: Antidiuretic
Aquaporins are Ans: water channels
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To produce concentrated urine, one would want to make
epithelial cells __ salty than tubular fluid Ans: more
Where are aquaporins located? Ans: Both apically and
basolaterally in renal tubules
One way to reduce the reabsorption of water is to __ the
number of aquaporins expressed. Ans: reduce
Where in the kidney is urine able to be concentrated?
Ans: Renal medulla, by juxtamedullary nephrons
Water moves __ the filtrate while traveling from the
cortex to the medulla Ans: out of
The main site of water reabsorption is the Ans: distal
tubule
AVP __ water therefore preventing __ Ans: conserves,
diuresis
Where is AVP synthesized? Ans: Hypothalamus
Where is AVP stored? Ans: Posterior Pituitary gland
What are the two triggers for AVP release? Ans:
Increased plasma osmolarity and
Decreased Blood pressure/ volume
What is the magic osmolarity # for many mammals?
Ans: 300 mosmol/kg
Biol 373 Unit 4c and 4d Questions with
Detailed Verified Answers
Water loss can be caused be urine, but also: Ans:
Feces, sweat and lungs
Thirst is Ans: a behavioural mechanism for
compensation of water loss
Can kidneys restore lost water? Ans: No. Kidneys can
conserve water but not restore.
Osmolarity of the __ indicates how much water is being
excreted by the kidneys. Ans: Urine
Diuresis is Ans: increased urine production
Diuretics Ans: Increase the amount of urine produced
and is usually a drug
Water can __ through the lipid bilayer in most cells but
this movement is slow. Ans: leak
To conserve water, should one take a diuretic or an
antidiuretic? Ans: Antidiuretic
Aquaporins are Ans: water channels
, Page | 2
To produce concentrated urine, one would want to make
epithelial cells __ salty than tubular fluid Ans: more
Where are aquaporins located? Ans: Both apically and
basolaterally in renal tubules
One way to reduce the reabsorption of water is to __ the
number of aquaporins expressed. Ans: reduce
Where in the kidney is urine able to be concentrated?
Ans: Renal medulla, by juxtamedullary nephrons
Water moves __ the filtrate while traveling from the
cortex to the medulla Ans: out of
The main site of water reabsorption is the Ans: distal
tubule
AVP __ water therefore preventing __ Ans: conserves,
diuresis
Where is AVP synthesized? Ans: Hypothalamus
Where is AVP stored? Ans: Posterior Pituitary gland
What are the two triggers for AVP release? Ans:
Increased plasma osmolarity and
Decreased Blood pressure/ volume
What is the magic osmolarity # for many mammals?
Ans: 300 mosmol/kg
