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EXSC 224 Exam 3 Questions with 100% Correct Answers | Rated A+
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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 ___...

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  • December 23, 2024
  • 35
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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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




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©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




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©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




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©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

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©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

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