Question 1

Which of the following best describes the correct sequence of blood flow through the major types of blood vessels in the systemic circuit?

Accepted Answer

Arteries → Arterioles → Capillaries → Venules → Veins

Question 2

Bulk flow across capillary walls is determined by the balance of hydrostatic and osmotic pressures. If the capillary hydrostatic pressure is $$22\ \mathrm{mm\ Hg}$$ and the capillary osmotic pressure is $$10\ \mathrm{mm\ Hg}$$, what is the net outward pressure?

Accepted Answer

$$12\ \mathrm{mm\ Hg}$$

Question 3

Which vessel has the highest blood pressure in the circulatory system?

Accepted Answer

Aorta

Question 4

A patient presents with peripheral edema. Which of the following is the most likely physiological cause?

Accepted Answer

Increased capillary hydrostatic pressure

Question 5

Which of the following statements about veins is TRUE?

Accepted Answer

Veins have valves to prevent backflow of blood.

Question 6

Which vessel is responsible for the exchange of gases and nutrients between blood and tissues?

Accepted Answer

Capillaries

Question 7

If the total cross-sectional area of capillaries increases, what happens to the velocity of blood flow through them?

Accepted Answer

It decreases

Question 8

Which of the following best explains why blood plasma, but not blood cells, leaks out of capillaries?

Accepted Answer

Blood cells are too large to pass through capillary walls

Question 9

Which of the following arteries supplies oxygenated blood directly to the heart muscle?

Accepted Answer

Coronary artery

Question 10

A blockage in the hepatic portal vein would most directly affect which organ’s ability to process nutrients and toxins?

Accepted Answer

Liver

Question 11

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

Accepted Answer

Filtering interstitial fluid and returning it to the circulatory system

Question 12

During exercise, blood flow to skeletal muscles increases. Which vessel type is primarily responsible for adjusting blood flow to these tissues?

Accepted Answer

Arterioles

Question 13

Which of the following best describes the role of precapillary sphincters?

Accepted Answer

They regulate blood flow into capillary beds

Question 14

If a patient has a blood pressure of $$120/80\ \mathrm{mm\ Hg}$$, what does the $$80\ \mathrm{mm\ Hg}$$ value represent?

Accepted Answer

Diastolic pressure

Question 15

Which of the following is TRUE about the pulmonary circuit?

Accepted Answer

It carries deoxygenated blood from the right ventricle to the lungs

Question 16

Which of the following would most likely result from a failure of venous valves in the lower limbs?

Accepted Answer

Varicose veins

Question 17

Which formula correctly represents the relationship between blood flow ($$Q$$), pressure difference ($$\Delta P$$), and resistance ($$R) in a $$vessel?

Accepted Answer

$$Q = \Delta P / R$$

Question 18

Which of the following veins returns blood directly to the right atrium of the heart?

Accepted Answer

Superior vena cava

Question 19

A fetus has a unique pattern of blood circulation compared to an adult. Which structure allows blood to bypass the non-functional fetal lungs?

Accepted Answer

Foramen ovale

Question 20

Which of the following would most likely occur if the osmotic pressure in the capillaries decreased significantly?

Accepted Answer

More fluid would accumulate in the interstitial space, causing edema

Blood Vessels: Structure, Function, and Circulation in the Human Body

Guida di studio - Domande di pratica

Study guide - Flashcard