Question 1

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

Accepted Answer

To serve as exchange vessels where gases, nutrients, and wastes are transferred between blood and tissues

Question 2

Which layer of a blood vessel is primarily responsible for vasoconstriction and vasodilation?

Accepted Answer

Tunica media

Question 3

A patient presents with sustained blood pressure readings of 150/95 mm Hg. Which condition does this most likely indicate?

Accepted Answer

Hypertension

Question 4

Which of the following equations correctly expresses the relationship between blood flow ($$F$$), pressure gradient ($$\Delta P$$), and resistance ($$R$$)?

Accepted Answer

$$F = \dfrac{\Delta P}{R}$$

Question 5

Which type of artery is most likely to function as a pressure reservoir, expanding and recoiling as blood is ejected from the heart?

Accepted Answer

Elastic (conducting) artery

Question 6

A patient loses a significant amount of blood due to trauma. Which type of circulatory shock is most likely to occur?

Accepted Answer

Hypovolemic shock

Question 7

Which of the following mechanisms is most important for the short-term regulation of blood pressure?

Accepted Answer

Baroreceptor reflexes

Question 8

Which of the following statements about veins is correct?

Accepted Answer

Veins have valves to prevent backflow of blood

Question 9

Calculate the mean arterial pressure (MAP) for a patient with a systolic pressure of 130 mm Hg and a diastolic pressure of 85 mm Hg. Use the formula $$MAP = 	ext{diastolic pressure} + \dfrac{1}{3} 	imes 	ext{pulse pressure}.$$

Accepted Answer

$$MAP = 100 mm Hg$$

Question 10

Which of the following is a major factor that increases peripheral resistance in blood vessels?

Accepted Answer

Smaller vessel diameter

Question 11

Which type of capillary is most permeable, allowing large molecules and even blood cells to pass through?

Accepted Answer

Sinusoidal capillary

Question 12

A patient stands for a prolonged period and develops swollen ankles. Which physiological mechanism is most likely impaired?

Accepted Answer

Skeletal muscle pump

Question 13

Which of the following best explains why blood pressure is lower in veins compared to arteries?

Accepted Answer

Blood pressure decreases as blood flows through the vascular system due to resistance

Question 14

Which pressure is primarily responsible for driving fluid out of capillaries at the arterial end?

Accepted Answer

Capillary hydrostatic pressure

Question 15

Which of the following is NOT a direct effect of angiotensin II in the regulation of blood pressure?

Accepted Answer

Decreases sensation of thirst

Question 16

Which of the following would most likely result in an increase in blood pressure?

Accepted Answer

Increased cardiac output

Question 17

Which of the following is a correct route for the movement of water-soluble substances across capillary walls?

Accepted Answer

Movement through intercellular clefts and fenestrations

Question 18

A patient with Addison's disease is most likely to experience which blood pressure abnormality?

Accepted Answer

Hypotension

Question 19

Which of the following best describes the effect of increased blood vessel length on peripheral resistance?

Accepted Answer

Peripheral resistance increases

Question 20

Which of the following is a consequence of untreated chronic hypertension?

Accepted Answer

Enlargement and weakening of the myocardium

Chapter 18: The Cardiovascular System – The Blood Vessels

Guida di studio - Domande di pratica

Study guide - Flashcard