EXSC 224 Exam 3 Questions with 100%
Correct Answers | Rated A+
What tissue does blood arise from? - ✔✔connective tissue (mesenchyme)
Of the following blood vessel components which is the most critical in
regulating systemic blood pressure - ✔✔tunica media
An increasing lumen diameter is termed __________, and occurs when
smooth muscle __________. - ✔✔vasodilation, relaxes
Which type of blood vessel has the largest amount of fibrous tissues -
✔✔muscular arteries
Of the following vessel types which are responsible for the exchange of
gases and nutrients with tissues - ✔✔capillaries
Of the following vessel types which conduct a blood towards the heart
regardless of oxygen content - ✔✔Veins
Of the following cardiovascular components which contains the majority of
the body's blood volume at any one time - ✔✔Systemic veins and venules
1
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
,Some of the least permeable capillaries are found in the ______, while
some of the most permeable capillaries are found in the _____ - ✔✔brain;
bone marrow
Predict the change in peripheral resistance as blood vessel diameter
increases - ✔✔Peripheral resistance decreases
Pulse pressure disappears by the time blood reaches capillary beds
because - ✔✔the muscular arterioles do not exhibit elastic rebound
What effect does prolonged standing in one position have on blood flow? -
✔✔It causes blood pooling and a slowing of blood flow.
What is the major factor controlling stroke volume during resting periods -
✔✔Venous return to the heart
Predict what might happen to the peripheral resistance in arterioles
supplying skeletal muscle when pH levels drop - ✔✔Vasodilation in vessels
supplying skeletal muscle
Baroreceptors detect changes in _____. - ✔✔stretch in arterial walls
When blood volume is increased, which of the following hormones would
you expect to increase? - ✔✔atrial natriuretic peptide
2
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
,Why does blood velocity decrease as it flows into a capillary bed? - ✔✔The
cross-sectional area of the capillary beds is approximately 2000x than that
of the aorta.
A decrease in 02 level in skeletal muscle would initiate an autoregulatory
mechanism that would stimulate _____ in the arterioles supplying the
muscle. - ✔✔vasodilation
Why is vasodilation prominent in the skin when a person increases physical
activity? - ✔✔Heat is dissipated across the skin from the blood to help cool
the body.
In what way is pulmonary circulation different from circulation in other body
tissues? - ✔✔As opposed to other tissues, low O2 levels in the lungs
induces vasoconstriction.
The primary mechanism driving filtration in capillary beds is _______. -
✔✔hydrostatic pressure within the capillaries
Capillary colloid osmotic pressure created by ____ tends to ______. -
✔✔nondiffusable plasma proteins; draw fluids into the capillary
The left pulmonary artery carries ______ blood and ______ blood to/from
the _______ - ✔✔deoxygenated, delivers, lung
3
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
, The superior vena cava receives systemic blood draining from all areas
superior to the diaphragm except the - ✔✔heart wall
WHich vessel receives blood drainage from the liver and returns in to the
heart? - ✔✔inferior vena cava
The apex of the heart points - ✔✔inferiorly toward the left hip
What is the double walled Sac covering the heart - ✔✔Pericardium
Of the following layers of the heart wall, which consumes the most energy -
✔✔myocardium
Which of the following structures is an exception to the general principle
surrounding blood vessel oxygenation levels - ✔✔Both a and c (pulmonary
artery, pulmonary veins)
Which of the following statements is true?
A. All arteries transport oxygen rich blood
B. The right side of the heart is the systemic circuit pub
C. Equal volumes of blood are pumped to the pulmonary and systemic
circuits at any moment
D. The left side of the heart pumps blood to the lungs - ✔✔C. Equal
volumes of blood are pumped to the pulmonary and systemic circuit at any
moment
4
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
Correct Answers | Rated A+
What tissue does blood arise from? - ✔✔connective tissue (mesenchyme)
Of the following blood vessel components which is the most critical in
regulating systemic blood pressure - ✔✔tunica media
An increasing lumen diameter is termed __________, and occurs when
smooth muscle __________. - ✔✔vasodilation, relaxes
Which type of blood vessel has the largest amount of fibrous tissues -
✔✔muscular arteries
Of the following vessel types which are responsible for the exchange of
gases and nutrients with tissues - ✔✔capillaries
Of the following vessel types which conduct a blood towards the heart
regardless of oxygen content - ✔✔Veins
Of the following cardiovascular components which contains the majority of
the body's blood volume at any one time - ✔✔Systemic veins and venules
1
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
,Some of the least permeable capillaries are found in the ______, while
some of the most permeable capillaries are found in the _____ - ✔✔brain;
bone marrow
Predict the change in peripheral resistance as blood vessel diameter
increases - ✔✔Peripheral resistance decreases
Pulse pressure disappears by the time blood reaches capillary beds
because - ✔✔the muscular arterioles do not exhibit elastic rebound
What effect does prolonged standing in one position have on blood flow? -
✔✔It causes blood pooling and a slowing of blood flow.
What is the major factor controlling stroke volume during resting periods -
✔✔Venous return to the heart
Predict what might happen to the peripheral resistance in arterioles
supplying skeletal muscle when pH levels drop - ✔✔Vasodilation in vessels
supplying skeletal muscle
Baroreceptors detect changes in _____. - ✔✔stretch in arterial walls
When blood volume is increased, which of the following hormones would
you expect to increase? - ✔✔atrial natriuretic peptide
2
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
,Why does blood velocity decrease as it flows into a capillary bed? - ✔✔The
cross-sectional area of the capillary beds is approximately 2000x than that
of the aorta.
A decrease in 02 level in skeletal muscle would initiate an autoregulatory
mechanism that would stimulate _____ in the arterioles supplying the
muscle. - ✔✔vasodilation
Why is vasodilation prominent in the skin when a person increases physical
activity? - ✔✔Heat is dissipated across the skin from the blood to help cool
the body.
In what way is pulmonary circulation different from circulation in other body
tissues? - ✔✔As opposed to other tissues, low O2 levels in the lungs
induces vasoconstriction.
The primary mechanism driving filtration in capillary beds is _______. -
✔✔hydrostatic pressure within the capillaries
Capillary colloid osmotic pressure created by ____ tends to ______. -
✔✔nondiffusable plasma proteins; draw fluids into the capillary
The left pulmonary artery carries ______ blood and ______ blood to/from
the _______ - ✔✔deoxygenated, delivers, lung
3
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
, The superior vena cava receives systemic blood draining from all areas
superior to the diaphragm except the - ✔✔heart wall
WHich vessel receives blood drainage from the liver and returns in to the
heart? - ✔✔inferior vena cava
The apex of the heart points - ✔✔inferiorly toward the left hip
What is the double walled Sac covering the heart - ✔✔Pericardium
Of the following layers of the heart wall, which consumes the most energy -
✔✔myocardium
Which of the following structures is an exception to the general principle
surrounding blood vessel oxygenation levels - ✔✔Both a and c (pulmonary
artery, pulmonary veins)
Which of the following statements is true?
A. All arteries transport oxygen rich blood
B. The right side of the heart is the systemic circuit pub
C. Equal volumes of blood are pumped to the pulmonary and systemic
circuits at any moment
D. The left side of the heart pumps blood to the lungs - ✔✔C. Equal
volumes of blood are pumped to the pulmonary and systemic circuit at any
moment
4
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
