BIOL 322 Questions from Exam 2
True or False. Decreasing total peripheral resistance decreases the blood volume in the
arteries. - answer True
A decrease in mean arterial pressure would lead to:
a) increased parasympathetic activity
b) increased production of angiotensin II
c) secretion of epinephrine
d) secretion of vasopressin
e) increased sympathetic activity
f) increased firing rate of the baroreceptor afferents – answer b, c, d, and e
increased production of angiotensin II, secretion of epinephrine, secretion of
vasopressin, and increased sympathetic activity
The V1 vasopressin receptor is linked with:
a) Gq proteins
b) Gi proteins
c) Gs proteins - answera) Gq proteins
Generally, there is more resistance to blood flow in
a) veins
b) arteries - answerb) arteries
True or False. If most of the arterioles decrease their diameter, the blood flow through
all of the systemic arterioles will be less than the blood flow through all of the systemic
arteries after a few minutes. - answerFalse. Since it is a closed system, the blood flow
through all of the arterioles has to be the same as the blood flow through all of the
arteries.
True or False. In most people, a hemorrhage of 15% of their blood volume will result in
a significant decrease in mean arterial pressure. - answerFalse
True or False. Smooth muscle concentration is an all-or-none phenomenon. -
answerFalse
A negative net filtration pressure favors
a) filtration
b) absorption - answerb) absorption
True or false. Precapillary sphincters relax in response to low oxygen levels -
answerTrue
, The driving force for blood flow
a) is greater from the capillaries to the heart than from the heart to the capillaries
b) is the same from the capillaries to the heart as from the heart to the capillaries
c) is greater from the heart to the capillaries than from the capillaries to the heart -
answerc) is greater from the heart to the capillaries than from the capillaries to the heart
(pressure decreases as it moves through the cardiovascular tree)
The slowest blood flow is through the
a) arteries
b) arterioles
c) capillaries
d) venules
e) veins - answerc) capillaries
Which of the following does the body primarily regulate?
a) diastolic pressure
b) systolic pressure
c) mean arterial pressure
d) pulse pressure - answerc) mean arterial pressure
Constricting a few arterioles without changing the tone in the rest of the arterioles will
lead to
a) a decrease in mean arterial pressure
b) no change in mean arterial pressure
c) an increase in mean arterial pressure - answerc) an increase in mean arterial
pressure
Age
a) decreases arterial compliance
b) increases arterial compliance
c) do not affect arterial compliance - answera) decreases arterial compliance
True or False. Throughout most of the body the capillary wall has multiple cell layers. -
answerFalse. The capillary wall only has one cell layer throughout most of the body.
The only place multiple cell layers are found is in the capillaries of the brain.
Decreasing arterial compliance (select all that apply)
a) increases mean arterial pressure
b) decreases diastolic pressure
c) increases systolic pressure
d) decreases mean arterial pressure
e) increases diastolic pressure
f) decreases systolic pressure - answerb and c
decreases diastolic pressure and increases systolic pressure
True or False. Decreasing total peripheral resistance decreases the blood volume in the
arteries. - answer True
A decrease in mean arterial pressure would lead to:
a) increased parasympathetic activity
b) increased production of angiotensin II
c) secretion of epinephrine
d) secretion of vasopressin
e) increased sympathetic activity
f) increased firing rate of the baroreceptor afferents – answer b, c, d, and e
increased production of angiotensin II, secretion of epinephrine, secretion of
vasopressin, and increased sympathetic activity
The V1 vasopressin receptor is linked with:
a) Gq proteins
b) Gi proteins
c) Gs proteins - answera) Gq proteins
Generally, there is more resistance to blood flow in
a) veins
b) arteries - answerb) arteries
True or False. If most of the arterioles decrease their diameter, the blood flow through
all of the systemic arterioles will be less than the blood flow through all of the systemic
arteries after a few minutes. - answerFalse. Since it is a closed system, the blood flow
through all of the arterioles has to be the same as the blood flow through all of the
arteries.
True or False. In most people, a hemorrhage of 15% of their blood volume will result in
a significant decrease in mean arterial pressure. - answerFalse
True or False. Smooth muscle concentration is an all-or-none phenomenon. -
answerFalse
A negative net filtration pressure favors
a) filtration
b) absorption - answerb) absorption
True or false. Precapillary sphincters relax in response to low oxygen levels -
answerTrue
, The driving force for blood flow
a) is greater from the capillaries to the heart than from the heart to the capillaries
b) is the same from the capillaries to the heart as from the heart to the capillaries
c) is greater from the heart to the capillaries than from the capillaries to the heart -
answerc) is greater from the heart to the capillaries than from the capillaries to the heart
(pressure decreases as it moves through the cardiovascular tree)
The slowest blood flow is through the
a) arteries
b) arterioles
c) capillaries
d) venules
e) veins - answerc) capillaries
Which of the following does the body primarily regulate?
a) diastolic pressure
b) systolic pressure
c) mean arterial pressure
d) pulse pressure - answerc) mean arterial pressure
Constricting a few arterioles without changing the tone in the rest of the arterioles will
lead to
a) a decrease in mean arterial pressure
b) no change in mean arterial pressure
c) an increase in mean arterial pressure - answerc) an increase in mean arterial
pressure
Age
a) decreases arterial compliance
b) increases arterial compliance
c) do not affect arterial compliance - answera) decreases arterial compliance
True or False. Throughout most of the body the capillary wall has multiple cell layers. -
answerFalse. The capillary wall only has one cell layer throughout most of the body.
The only place multiple cell layers are found is in the capillaries of the brain.
Decreasing arterial compliance (select all that apply)
a) increases mean arterial pressure
b) decreases diastolic pressure
c) increases systolic pressure
d) decreases mean arterial pressure
e) increases diastolic pressure
f) decreases systolic pressure - answerb and c
decreases diastolic pressure and increases systolic pressure
