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University of Waterloo: BIOL 373 Midterm Exam 2 Answered Fall 2024. CA$12.16
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University of Waterloo: BIOL 373 Midterm Exam 2 Answered Fall 2024.
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BIOL 373 MIDTERM 2 Highlighted in Green = Confirmed Right Answer Highlighted in Yellow = Need to double check Highlighted in this = friend’s test 1. Kidneys participate all but one of the following, identify the EXCEPTION: a) Regulation of plasma protein concentrations b) Regulation of acid...

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  • October 4, 2024
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  • 2024/2025
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BIOL 373 MIDTERM 2

Highlighted in Green = Confirmed Right Answer
Highlighted in Yellow = Need to double check
Highlighted in this = friend’s test

1. Kidneys participate all but one of the following, identify the EXCEPTION:
a) Regulation of plasma protein concentrations
b) Regulation of acid-base balance
c) Regulation of Na+ homeostasis
d) Regulation of plasma osmolarity
e) Regulation of extracellular fluid volume

2. An unusual vascular arrangement found in nephrons includes…
a) Two capillary beds
b) Portal vein
c) Two arterioles
d) A and C
e) A B and C

3. Below are four process involved in ‘’ ‘“

Reabsorption: movement from tubular lumen to blood
Filtration: Movement from glomerulus to lumen of tubule
Excretion: movement from tubular lumen to external environment
Secretion: movement from peritubular capillaries to lumen of tubule

4. Place the following blood vessels that carry blood within a juxtamedullary nephron in the
order in which blood passes through them

Afferent arteriole -> glomerulus -> efferent arteriole -> peritubular capillaries -> vasa recta

5. Whether a molecule is filtered at the glomerulus depends on…
a) The presence of specific carriers for that molecule on glomerular capillary endothelium
b) Plasma vasopressin concentrations
c) It’s size and charge
d) A and C
e) A, B and C

6. All of the following are freely filtered at the glomerulus EXCEPT
a) Plasma proteins
b) Glucose
c) Erythrocytes
d) Potassium

, e) A and C

7. The main force driving glomerular filtration is the
a) ATP-dependent processes in the nephron
b) Plasma oncotic pressure
c) Osmotic pressure in the glomerular capillaries
d) Fluid pressure in the bowman’s capsule
e) Blood pressure in the glomerular capillaries

8. Measurements in a nephron reveal a glomerular hydrostatic pressure of 69 mmHg, and a
fluid pressure in the bowman’s capsule of 15 mmHg. If the colloid osmotic pressure of plasma in
30 mmHg and no plasma proteins are filtered by the glomerulus, what is the net glomerular
filtration pressure?
a) -6 mm Hg
b) 24 mm Hg
c) 54 mm Hg
d) 84 mm Hg
e) 114 mm Hg

Equations:




9. Your uncle has been diagnosed with hypertension. His mean arterial pressure is moderately
elevated at 140 mmHg. You would expect his glomerular filtration rate (GFR) to be __.

a) Elevated
b) Normal
c) Reduced

10. Which is NOT part of the barrier for renal filtration?
a) Apical membrane of proximal tubule epithelium
b) Basement membrane of glomerular capillaries
c) Sieve (meshwork) over filtration formed by specialized proteins
d) Podocyte foot processes
e) Glomerular capillary endothelium

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