Q: Which equation correctly calculates mean arterial pressure (MAP)?

$$MAP = \text{Diastolic Pressure} + \dfrac{1}{3} \times \text{Pulse Pressure}$$

Question 1

Which of the following best describes the function of arterial anastomosis in capillary beds?

Accepted Answer

It provides insurance against arterial blockage by allowing multiple arteries to supply blood to the same capillary bed.

Question 2

A patient presents with swollen, twisted veins in the legs and reports discomfort after standing for long periods. Which physiological mechanism is most likely impaired?

Accepted Answer

Valves in the veins are weakened or stretched, allowing blood to pool and leading to varicose veins.

Question 3

Which of the following is the main source of vascular resistance in the circulatory system?

Accepted Answer

Vessel diameter

Question 4

If a person suffers a serious hemorrhage, which response is triggered by the vasomotor center in the medulla oblongata?

Accepted Answer

Venoconstriction to maintain arterial pressure

Question 5

Which equation correctly calculates mean arterial pressure (MAP)?

Accepted Answer

$$MAP = 	ext{Diastolic Pressure} + \dfrac{1}{3} 	imes 	ext{Pulse Pressure}$$

Question 6

Blood flow through a vessel is directly proportional to which of the following?

Accepted Answer

Blood pressure

Question 7

Which of the following would most likely increase total peripheral resistance?

Accepted Answer

Decreasing vessel diameter

Question 8

A patient with chronic hypertension is found to have increased turbulence in their arteries. What is a likely cause of this turbulence?

Accepted Answer

Irregular surfaces or sudden changes in vessel diameter, such as from atherosclerotic plaques

Question 9

Which pressure is responsible for pushing water and soluble materials out of capillaries and into the interstitial fluid?

Accepted Answer

Capillary Hydrostatic Pressure (CHP)

Question 10

What is the net filtration pressure (NFP) in a capillary bed determined by?

Accepted Answer

The difference between capillary hydrostatic pressure (CHP) and blood colloid osmotic pressure (BCOP)

Question 11

Which of the following local vasodilators would be released in response to low oxygen or high carbon dioxide levels in tissue?

Accepted Answer

Nitric oxide (NO)

Question 12

Which neural center in the medulla oblongata is responsible for increasing cardiac output?

Accepted Answer

Cardioacceleratory center

Question 13

If blood viscosity increases due to dehydration, what effect would this have on peripheral resistance and blood flow?

Accepted Answer

Peripheral resistance increases and blood flow decreases

Question 14

Which hormone is most likely to be released in response to baroreceptor stimulation to help regulate blood pressure?

Accepted Answer

Antidiuretic hormone (ADH)

Question 15

Which of the following statements about venous valves is correct?

Accepted Answer

They are infolds of the tunica interna that prevent backflow of blood in veins, especially in the limbs.

Question 16

Which of the following best explains why the venous system contains 2/3 of the body's blood but venules have only 10% of the aortic pressure?

Accepted Answer

Venous walls are thinner and more compliant, allowing them to act as blood reservoirs at low pressure.

Question 17

Which of the following would most likely occur if autoregulation fails to maintain tissue perfusion?

Accepted Answer

Neural regulation via sympathetic stimulation will increase blood pressure and cardiac output.

Question 18

Which neurotransmitter is released by vasomotor centers to cause vasoconstriction?

Accepted Answer

Norepinephrine

Question 19

A patient with severe blood loss is experiencing a rapid drop in venous blood volume. Which compensatory mechanism is most likely to occur?

Accepted Answer

Venoconstriction mediated by sympathetic stimulation to maintain arterial pressure

Question 20

Which of the following best describes tissue perfusion?

Accepted Answer

The process of blood flow through tissues, delivering oxygen and nutrients while removing carbon dioxide and waste products.

Cardiovascular Physiology: Blood Flow, Pressure, and Regulation

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드