$$\text{NFP} = (\text{HP}_c + \text{OP}_{if}) - (\text{HP}_{if} + \text{OP}_c)$$

Capillary colloid osmotic pressure ($$\text{OP}_c)$$

Question 1

Which of the following best describes intrinsic control of blood flow?

Accepted Answer

It is controlled entirely from within the tissue or organ, often using paracrines or properties of muscle tissue.

Question 2

During strenuous exercise, which organ receives the largest increase in blood flow compared to rest?

Accepted Answer

Skeletal muscles

Question 3

Which of the following is a vasodilator released by endothelial cells in response to increased metabolic activity?

Accepted Answer

Nitric oxide (NO)

Question 4

What is the physiological response in skeletal muscle during exercise that leads to increased blood flow?

Accepted Answer

Vasodilation of arterioles due to increased metabolic factors in extracellular fluid

Question 5

Why is blood flow velocity slowest in capillaries?

Accepted Answer

Capillaries have the largest total cross-sectional area.

Question 6

Which of the following is NOT a route by which molecules cross capillary walls?

Accepted Answer

Movement through the basement membrane only

Question 7

Which equation correctly represents the net filtration pressure (NFP) across a capillary bed?

Accepted Answer

$$	ext{NFP} = (	ext{HP}_c + 	ext{OP}_{if}) - (	ext{HP}_{if} + 	ext{OP}_c)$$

Question 8

A patient develops pitting edema after surgery. Which mechanism is most likely responsible?

Accepted Answer

Decreased drainage of interstitial fluid through blocked lymphatic vessels

Question 9

Which pressure is responsible for 'sucking' fluid back into the capillary?

Accepted Answer

Capillary colloid osmotic pressure ($$	ext{OP}_c)$$

Question 10

Which of the following would most likely cause an increase in outward pressure and lead to edema?

Accepted Answer

Incompetent venous valves

Question 11

Which of the following statements about pulmonary circulation is correct?

Accepted Answer

Pulmonary arteries are thin-walled and have large lumens compared to systemic arteries.

Question 12

Which vessel is most likely to be paired with a corresponding artery in the deep tissues of the body?

Accepted Answer

Deep vein

Question 13

Which of the following is a unique feature of venous drainage in the digestive system?

Accepted Answer

Veins drain into the hepatic portal system before returning to the heart.

Question 14

Which of the following is a correct statement about the development of blood vessels?

Accepted Answer

Vascular endothelial growth factor determines whether a vessel becomes an artery or vein.

Question 15

Which of the following is a function of blood flow through the skin?

Accepted Answer

Regulation of body temperature

Question 16

Which of the following would most likely occur if mean arterial pressure (MAP) drops below 60 mm Hg?

Accepted Answer

Syncope (fainting)

Question 17

Which of the following is true regarding the autoregulatory response of vascular smooth muscle to increased MAP?

Accepted Answer

Smooth muscle constricts, decreasing blood flow to tissue.

Question 18

Which of the following is a long-term mechanism for increasing blood supply to a region?

Accepted Answer

Angiogenesis (increase in number of vessels)

Question 19

Which of the following is a correct statement about capillary exchange?

Accepted Answer

Lipid-soluble molecules diffuse directly through endothelial membranes.

Question 20

Which of the following would most likely impair tissue function due to increased distance for diffusion of gases, nutrients, and wastes?

Accepted Answer

Edema

Blood Flow, Capillary Exchange, and Circulatory Pathways: ANP Study Guide

Study Guide - Practice Questions