BMS 300 Exam 4 questions well answered to pass
(2025-2026)
1. Ouabain is a plant toxin that blocks the Na/K
e. c and d are correct
ATPase. You would expect to find labeled
ouabain in the:
a. apical membranes of the epithelial cells of
the de- scending limb of the loop of the
nephron
b. in the apical membranes of the epithelial cells
of the proximal convoluted tubule
c.in the basilar membranes of the epithelial cells
in the thick segment of the ascending limb
d. in the basilar membranes of the epithelial
cells of the distal convoluted tubule
e. c and d are correct b. HCO3- and H+ from
CO2 and H2O
2. In the capillaries of the brain, carbonic
anhydrase in erythrocytes predominately
generates:
a. CO2 from HCO3- and H+
b. HCO3- and H+ from CO2 and H2O
c. Oxyhemoglobin
d. O2 from CO2
e. a and b are correct
3. The driving force that moves water from the luminal to e. only a
and b are correct
the basolateral side of epithelial cells in the
proximal convoluted tubule results from:
a. a lower water concentration on the
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21
,BMS 300 Exam 4 questions well answered to pass
(2025-2026)
basolateral side of the epithelial cells
b. the effects of Na/K ATPase pumps moving
Na+ from the epithelial cell cytoplasm into the
extracellular space on the basolateral side of
the cell
c.the effects of Na driven cotransporters allowing Na+
2/
21
, BMS 300 Exam 4 questions well answered to pass
(2025-2026)
to leave the epithelial cells receptors
d. all of the above are correct on
e. only a and b are correct bronchiol
ar
4. Disaccharidases convert disaccharides to smooth
hexose sug- ars. These enzymes are examples muscle
of: b. acetylch
oline
a. brush border enzymes
binding to
b. enzymes released from acinar cells
nicotinic
c. enzymes secreted as inactive precursors
acetycholi
enzymes
ne re-
d. enzymes that enter the duodenum from
ceptors on
the pan- creas
bronchiola
e. all except a are correct
r smooth
5. Type II pneumocytes release amphipathic muscle
molecules that are composed mostly of c. epinephrin
phosphatidycholine to: e binding to
beta-1
a. increase lung compliance receptors on
b. decrease lung compliance bronchi- olar
c. decrease lung elastic recoil smooth
d. increase lung elastic recoil muscle
e. a and c are correct
6. During an asthmatic response, histamine
released from mast cells causes bronchiolar
smooth muscle contraction. This effect can
be offset by:
a. acetylcholine binding to muscarinic
3/
21
(2025-2026)
1. Ouabain is a plant toxin that blocks the Na/K
e. c and d are correct
ATPase. You would expect to find labeled
ouabain in the:
a. apical membranes of the epithelial cells of
the de- scending limb of the loop of the
nephron
b. in the apical membranes of the epithelial cells
of the proximal convoluted tubule
c.in the basilar membranes of the epithelial cells
in the thick segment of the ascending limb
d. in the basilar membranes of the epithelial
cells of the distal convoluted tubule
e. c and d are correct b. HCO3- and H+ from
CO2 and H2O
2. In the capillaries of the brain, carbonic
anhydrase in erythrocytes predominately
generates:
a. CO2 from HCO3- and H+
b. HCO3- and H+ from CO2 and H2O
c. Oxyhemoglobin
d. O2 from CO2
e. a and b are correct
3. The driving force that moves water from the luminal to e. only a
and b are correct
the basolateral side of epithelial cells in the
proximal convoluted tubule results from:
a. a lower water concentration on the
1/
21
,BMS 300 Exam 4 questions well answered to pass
(2025-2026)
basolateral side of the epithelial cells
b. the effects of Na/K ATPase pumps moving
Na+ from the epithelial cell cytoplasm into the
extracellular space on the basolateral side of
the cell
c.the effects of Na driven cotransporters allowing Na+
2/
21
, BMS 300 Exam 4 questions well answered to pass
(2025-2026)
to leave the epithelial cells receptors
d. all of the above are correct on
e. only a and b are correct bronchiol
ar
4. Disaccharidases convert disaccharides to smooth
hexose sug- ars. These enzymes are examples muscle
of: b. acetylch
oline
a. brush border enzymes
binding to
b. enzymes released from acinar cells
nicotinic
c. enzymes secreted as inactive precursors
acetycholi
enzymes
ne re-
d. enzymes that enter the duodenum from
ceptors on
the pan- creas
bronchiola
e. all except a are correct
r smooth
5. Type II pneumocytes release amphipathic muscle
molecules that are composed mostly of c. epinephrin
phosphatidycholine to: e binding to
beta-1
a. increase lung compliance receptors on
b. decrease lung compliance bronchi- olar
c. decrease lung elastic recoil smooth
d. increase lung elastic recoil muscle
e. a and c are correct
6. During an asthmatic response, histamine
released from mast cells causes bronchiolar
smooth muscle contraction. This effect can
be offset by:
a. acetylcholine binding to muscarinic
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21
