Practice Questions for Renal Physiology with correct answers

Practice Questions for Renal Physiology with correct
answers

Reabsorption:
A. From blood into tubular fluid
B. From tubular fluid into blood - Answer B. From tubular fluid into
blood

Filtration:
A. From blood into tubular fluid
B. From tubular fluid into blood - Answer A. From blood into tubular
fluid

Secretion:
A. From blood into tubular fluid
B. From tubular fluid into blood - Answer A. From blood into tubular
fluid

The rate of excretion of a substance is the addition of amount filtered
and secreted from which the amount that is reabsorbed is subtracted.
A. True
B. False - Answer A. True

The filtration fraction is the amount of water and solutes that leave the
glomerular capillary bed and enter Bowman's space.
A. True
B. False - Answer B. False

this is technically the filtrate, filtration fraction is percentage of blood in
afferent arteriole that becomes filtrate. Sort of picky I admit.

,The filtration membrane consists of which of the following?
A. The visceral layer of Bowman's capsule (mesangial cells)
B. The fenestrated endothelium of the glomerulus
C. Both
D. Neither - Answer B. The fenestrated endothelium of the glomerulus

Filtration is the process that moves water and solutes across the
endothelium due to a concentration gradient.
A. True
B. False - Answer B. False

When the mesangial cells contract there is a larger surface area for
filtration to occur at the filtration membrane.
A. True
B. False - Answer B. False

Which of the following has the larger diameter?
A. Efferent arteriole
B. Afferent arteriole
C. They have the same diameter - Answer B. Afferent arteriole

The hydrostatic pressure in the glomerular capillaries is _____. The
oncotic pressure in the glomerular capillary is ______. The net filtration
pressure at the glomerular capillary bed is ________. - Answer 55mm
Hg
30 mm Hg
10 mm Hg

, The glomerular filtration rate is the amount of filtrate formed by a
single kidney each day.
A. True
B. False - Answer B. False

The GFR is directly proportional to the net filtration pressure. Filtration
stops if the hydrostatic pressure in the capillary bed drops to 45 mm Hg.
A. True
B. False - Answer A. True

Which of the following is true?
A. Stretching of the smooth muscle of the afferent arteriole will cause a
decrease in the GFR
B. The macular densa cells can detect excessive increased flow in the
afferent arteriole and then subsequently increase the amount of nitric
oxide released
C. Both
D. Neither - Answer A. Stretching of the smooth muscle of the afferent
arteriole will cause a decrease in the GFR

The macular densa cells are located in the afferent arteriole.
A. True
B. False - Answer B. False

The type of adrenergic receptors on the smooth muscle of the afferent
arterioles is which of the following?
A. Alpha-1
B. Alpha-2
C. Beta-1
D. Beta-2 - Answer A. Alpha-1