Q: Which equation correctly represents the calculation of mean arterial pressure (MAP)?

$$\text{MAP} = \text{diastolic pressure} + \frac{1}{3}(\text{systolic pressure} - \text{diastolic pressure})$$

Q: Bulk flow across capillary walls is determined by which of the following equations?

$$\text{Net pressure} = P - \pi$$

Question 1

Which of the following best describes the primary function of arterioles in the cardiovascular system?

Accepted Answer

They are the primary site of variable resistance, regulating blood flow to tissues.

Question 2

A patient stands up quickly and experiences dizziness. Which physiological mechanism is primarily responsible for compensating for this change in posture?

Accepted Answer

Baroreceptor reflex

Question 3

Which equation correctly represents the calculation of mean arterial pressure (MAP)?

Accepted Answer

$$	ext{MAP} = 	ext{diastolic pressure} + \frac{1}{3}(	ext{systolic pressure} - 	ext{diastolic pressure})$$

Question 4

Which of the following would most likely increase peripheral resistance and thus raise blood pressure?

Accepted Answer

Increased vessel length

Question 5

A drug that blocks $$$$eta_2$$-adrenergic receptors would have which of the following effects on arterioles supplying skeletal muscle?

Accepted Answer

It would cause vasoconstriction, decreasing blood flow.

Question 6

Which of the following statements about capillaries is TRUE?

Accepted Answer

They are the primary site of exchange between blood and interstitial fluid.

Question 7

Bulk flow across capillary walls is determined by which of the following equations?

Accepted Answer

$$	ext{Net pressure} = P - \pi$$

Question 8

Which of the following is a function of the lymphatic system?

Accepted Answer

It returns filtered fluid and proteins to the circulatory system.

Question 9

A patient with untreated hypertension is at increased risk for which of the following complications?

Accepted Answer

Atherosclerosis and congestive heart failure

Question 10

Which of the following best explains why velocity of blood flow is lowest in the capillaries?

Accepted Answer

The total cross-sectional area of all capillaries is greatest.

Question 11

Which of the following would most likely result in edema?

Accepted Answer

Inadequate lymphatic drainage

Question 12

Which of the following cytokines promotes angiogenesis?

Accepted Answer

Vascular endothelial growth factor (VEGF)

Question 13

A patient with a genetic defect causing low levels of plasma proteins would most likely experience which of the following at the capillary level?

Accepted Answer

Decreased colloid osmotic pressure, leading to more filtration

Question 14

Which of the following is a correct statement about the baroreceptor reflex?

Accepted Answer

It is a tonic reflex that continuously monitors blood pressure.

Question 15

Which of the following would be expected to cause vasodilation in arterioles?

Accepted Answer

Increased release of nitric oxide

Question 16

If a patient has a cardiac output of 5 L/min and a total peripheral resistance of 20 mm Hg·min/L, what is their mean arterial pressure (MAP)? Use the formula $$	ext{MAP} = 	ext{CO} 	imes 	ext{TPR}.$$

Accepted Answer

$$100 mm Hg$$

Question 17

Which of the following is a controllable risk factor for cardiovascular disease?

Accepted Answer

Obesity

Question 18

Which of the following best describes the role of veins in the cardiovascular system?

Accepted Answer

They serve as a volume reservoir and return blood to the heart.

Question 19

Which of the following would most likely occur if the pre-capillary sphincters in a tissue remain closed?

Accepted Answer

Decreased blood flow to the capillaries of that tissue

Question 20

Which of the following is a direct effect of increased sympathetic stimulation on most systemic arterioles?

Accepted Answer

Vasoconstriction via $$\alpha-$$adrenergic receptors

Blood Flow and the Control of Blood Pressure

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드