1|Page
BIOL 252 Heart Physiology and Blood Vessels- Exam 3 Questions and
Answers with Complete Solutions UPDATED!!!
_______ might increase preload. Why? - ANSWER exercise
skeletal muscles move blood by building venous pressure--this
increases preload (more blood trying to force its way into your
heart)
A higher aortic pressure ______ the amount of blood ejected
from the ______ ventricle. - ANSWER decreases
left
about what percent of your blood is in the systemic circuit at
any given time? - ANSWER about 70%
afterload - ANSWER the blood pressure in the aorta and
pulmonary trunk that resists ejection of the ventricles
Afterload affects how easily the ______ can eject blood. -
ANSWER ventricles
,2|Page
Afterload is a measure of pressure on the other side of the
______ valves. - ANSWER semilunar
Afterload is determined by _______ pressure. - ANSWER
arterial
And about what percent of blood is in the veins? - ANSWER
about 54%
Are veins red or blue? - ANSWER both! the colors indicate
oxygen level
Arteries carry ______ pressure blood _____ from the heart. -
ANSWER high; away
artery structure that leads to capillary bed? - ANSWER
metarteriole
AV valves prevent blood flow from: - ANSWER ventricle back
into atria where it came from
, 3|Page
baroreceptors are located in: - ANSWER aorta
carotid arteries
Baroreceptors detect blood pressure. If we have hypertension,
what two things will result? - ANSWER lowering heart rate
vasodilation to reduce blood pressure
Besides increasing BP by way of exercise, how else can you
increase preload? - ANSWER have a lot of sodium in your diet
drink a bunch of water
(ELEVATE BLOOD VOLUME)--this means that if you elevate
blood pressure, no matter how you accomplish it, it will lead to
greater stroke volume
Blood flow depends on differences in pressure, so why is it a
challenge to bring blood back to the heart? - ANSWER because
venous blood is so low that at times, it's difficult to have a
pressure gradient at all
Both semilunar valves have ______ cusps. - ANSWER three
BIOL 252 Heart Physiology and Blood Vessels- Exam 3 Questions and
Answers with Complete Solutions UPDATED!!!
_______ might increase preload. Why? - ANSWER exercise
skeletal muscles move blood by building venous pressure--this
increases preload (more blood trying to force its way into your
heart)
A higher aortic pressure ______ the amount of blood ejected
from the ______ ventricle. - ANSWER decreases
left
about what percent of your blood is in the systemic circuit at
any given time? - ANSWER about 70%
afterload - ANSWER the blood pressure in the aorta and
pulmonary trunk that resists ejection of the ventricles
Afterload affects how easily the ______ can eject blood. -
ANSWER ventricles
,2|Page
Afterload is a measure of pressure on the other side of the
______ valves. - ANSWER semilunar
Afterload is determined by _______ pressure. - ANSWER
arterial
And about what percent of blood is in the veins? - ANSWER
about 54%
Are veins red or blue? - ANSWER both! the colors indicate
oxygen level
Arteries carry ______ pressure blood _____ from the heart. -
ANSWER high; away
artery structure that leads to capillary bed? - ANSWER
metarteriole
AV valves prevent blood flow from: - ANSWER ventricle back
into atria where it came from
, 3|Page
baroreceptors are located in: - ANSWER aorta
carotid arteries
Baroreceptors detect blood pressure. If we have hypertension,
what two things will result? - ANSWER lowering heart rate
vasodilation to reduce blood pressure
Besides increasing BP by way of exercise, how else can you
increase preload? - ANSWER have a lot of sodium in your diet
drink a bunch of water
(ELEVATE BLOOD VOLUME)--this means that if you elevate
blood pressure, no matter how you accomplish it, it will lead to
greater stroke volume
Blood flow depends on differences in pressure, so why is it a
challenge to bring blood back to the heart? - ANSWER because
venous blood is so low that at times, it's difficult to have a
pressure gradient at all
Both semilunar valves have ______ cusps. - ANSWER three
