Question 1

A patient presents with chronic fatigue and pallor. Laboratory results reveal a low red blood cell (RBC) count and decreased hemoglobin concentration. Which of the following best explains how this condition affects oxygen transport in the body?

Accepted Answer

Lower hemoglobin levels reduce the blood's capacity to carry oxygen, resulting in tissue hypoxia.

Question 2

Which of the following best describes the role of the sinoatrial (SA) node in cardiac physiology?

Accepted Answer

It initiates the electrical impulse that sets the pace for the heart rate.

Question 3

A patient is diagnosed with hypertension. Which of the following equations correctly relates blood pressure ($$BP$$), cardiac output ($$CO$$), and total peripheral resistance ($$TPR$$)?

Accepted Answer

$$BP = CO 	imes TPR$$

Question 4

During vigorous exercise, which physiological change occurs to meet the increased oxygen demand of skeletal muscles?

Accepted Answer

Increased heart rate and vasodilation of skeletal muscle arterioles

Question 5

Which of the following best explains the function of lymphatic capillaries in tissue fluid balance?

Accepted Answer

They absorb excess interstitial fluid and return it to the venous circulation.

Question 6

A patient with a blocked thoracic duct would most likely experience which of the following symptoms?

Accepted Answer

Edema in the lower limbs due to impaired lymph drainage

Question 7

Which of the following best describes the process of hemostasis?

Accepted Answer

A sequence of events that stops bleeding, including vascular spasm, platelet plug formation, and coagulation

Question 8

A laboratory test shows a patient's white blood cell (WBC) count is significantly elevated. Which of the following is the most likely explanation?

Accepted Answer

The patient is experiencing an immune response to infection.

Question 9

Which of the following best explains why the left ventricular wall of the heart is thicker than the right?

Accepted Answer

It must generate higher pressure to pump blood through the systemic circulation.

Question 10

A patient is found to have a mutation that impairs the function of helper T cells. Which aspect of immunity would be most directly affected?

Accepted Answer

Activation of both humoral and cell-mediated immune responses

Question 11

Which of the following best describes the Frank-Starling law of the heart?

Accepted Answer

The greater the stretch of cardiac muscle fibers during filling, the greater the force of contraction.

Question 12

A patient with a deficiency in clotting factor VIII would most likely present with which clinical manifestation?

Accepted Answer

Prolonged bleeding after injury

Question 13

Which of the following best explains the physiological significance of the Bohr effect in the respiratory system?

Accepted Answer

Increased $$CO_2$$ and decreased pH reduce hemoglobin's affinity for $$O_2$$, facilitating oxygen unloading in tissues.

Question 14

A patient is experiencing severe dehydration. Which of the following changes would you expect in their blood?

Accepted Answer

Increased hematocrit due to reduced plasma volume

Question 15

Which of the following best describes the function of the AV (atrioventricular) valves during the cardiac cycle?

Accepted Answer

They prevent backflow of blood from the ventricles into the atria during ventricular contraction.

Question 16

A patient with a genetic defect in the structure of their lymphatic vessels is most likely to experience which of the following complications?

Accepted Answer

Impaired immune response and tissue swelling (lymphedema)

Question 17

Which of the following best explains the physiological mechanism underlying the formation of edema?

Accepted Answer

Increased capillary hydrostatic pressure or decreased plasma protein concentration leads to excess fluid accumulation in tissues.

Question 18

A patient is given a blood transfusion with mismatched ABO blood type. Which of the following is the most likely immediate consequence?

Accepted Answer

Agglutination and hemolysis of transfused red blood cells

Question 19

Which of the following best describes the pathway of blood through the heart and pulmonary circulation?

Accepted Answer

Right atrium → right ventricle → pulmonary artery → lungs → pulmonary vein → left atrium

Question 20

A patient with a deficiency in albumin, a major plasma protein, is likely to develop which of the following conditions?

Accepted Answer

Edema due to decreased plasma oncotic pressure

Human Anatomy & Physiology II: Study Notes and Module Overview

Guida di studio - Domande di pratica

Study guide - Flashcard