Question 1

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

Accepted Answer

To connect arteries and veins and facilitate exchange of nutrients, gases, and wastes between blood and tissues

Question 2

A patient presents with swelling in the lower limbs due to increased capillary filtration and decreased capillary reabsorption. Which of the following is the most likely cause?

Accepted Answer

Decreased blood albumin concentration

Question 3

Which equation correctly represents the relationship between blood flow ($$F$$), pressure difference ($$\Delta P$$), and resistance ($$R$$)?

Accepted Answer

$$F = \Delta P / R$$

Question 4

Which type of blood vessel is most likely to have valves and why?

Accepted Answer

Veins, because they need to prevent backflow of blood at low pressure

Question 5

A patient with a dissecting aneurysm is at risk for which of the following complications?

Accepted Answer

Blood pooling between the tunics of an artery, potentially leading to rupture

Question 6

Which of the following best explains why blood pressure decreases as blood moves from arteries to veins?

Accepted Answer

Friction and resistance increase as blood travels through smaller vessels and over longer distances

Question 7

Which of the following hormones would most likely cause a decrease in blood pressure?

Accepted Answer

Atrial natriuretic factor (ANF)

Question 8

A patient stands up quickly and feels dizzy. Which reflex is primarily responsible for restoring blood pressure in this situation?

Accepted Answer

Baroreflex

Question 9

Which of the following capillary types is most permeable and found in organs such as the liver and spleen?

Accepted Answer

Sinusoidal (discontinuous) capillaries

Question 10

During exercise, which of the following changes in blood flow is most likely to occur?

Accepted Answer

Increased perfusion of skeletal muscles and myocardium

Question 11

Which of the following best describes the effect of vasoconstriction on blood pressure?

Accepted Answer

Increases blood pressure by decreasing vessel radius

Question 12

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

Accepted Answer

Aneurysm formation due to increased arterial wall stress

Question 13

Which of the following is the correct sequence of blood flow through the systemic circuit, starting at the left ventricle?

Accepted Answer

Left ventricle → arteries → capillaries → veins → right atrium

Question 14

Which of the following mechanisms is most important for the exchange of oxygen and carbon dioxide across capillary walls?

Accepted Answer

Diffusion

Question 15

A patient with a tumor compressing the inferior vena cava would most likely experience which type of shock?

Accepted Answer

Obstructed venous return shock

Question 16

Which of the following best explains why veins are called capacitance vessels?

Accepted Answer

They can expand easily to accommodate large volumes of blood

Question 17

Which of the following is a direct effect of the renin-angiotensin-aldosterone system (RAAS) on blood pressure?

Accepted Answer

Increases blood volume and vasoconstriction, raising blood pressure

Question 18

Which of the following best describes the role of baroreceptors in blood pressure regulation?

Accepted Answer

They detect changes in blood pressure and initiate reflexes to maintain homeostasis

Question 19

Which of the following would most likely result in increased peripheral resistance and higher blood pressure?

Accepted Answer

Vasoconstriction of arterioles

Question 20

A patient with a transient ischemic attack (TIA) experiences temporary neurological symptoms. What is the most likely underlying cause?

Accepted Answer

A brief period of reduced blood flow to the brain

Chapter 19: Blood Vessels – Structure, Function, and Clinical Relevance

Guida di studio - Domande di pratica

Study guide - Flashcard