Question 1

Which of the following best describes the primary function of erythrocytes in human blood?

Accepted Answer

To transport oxygen from the lungs to tissues

Question 2

A patient’s blood smear shows an abnormally high number of leukocytes. Which condition is most likely indicated by this finding?

Accepted Answer

Leukemia

Question 3

Which of the following blood elements is primarily responsible for initiating the clotting process?

Accepted Answer

Platelets

Question 4

When performing a differential white blood cell count, which cell type would be most elevated during a bacterial infection?

Accepted Answer

Neutrophils

Question 5

A person with blood type AB can safely receive blood from which of the following donors?

Accepted Answer

Any blood type (A, B, AB, O)

Question 6

Which anatomical feature separates the right and left sides of the heart?

Accepted Answer

The interventricular septum

Question 7

During the cardiac cycle, which event occurs immediately after ventricular systole?

Accepted Answer

Ventricular diastole

Question 8

Which vessel type is characterized by thick muscular walls and carries blood away from the heart?

Accepted Answer

Arteries

Question 9

Which of the following best explains why capillaries are the primary site of exchange between blood and tissues?

Accepted Answer

They possess thin walls and a large surface area

Question 10

A patient presents with a blood pressure of 160/100 mmHg. Which formula correctly calculates their mean arterial pressure (MAP)?

Accepted Answer

$$ MAP = Diastolic + \frac{1}{3}(Systolic - Diastolic) $$

Question 11

Which of the following is a histological difference between arteries and veins?

Accepted Answer

Arteries have thicker tunica media than veins

Question 12

Which part of the autonomic nervous system increases heart rate and blood pressure during a 'fight or flight' response?

Accepted Answer

Sympathetic nervous system

Question 13

Which structure is the primary site of gas exchange in the respiratory system?

Accepted Answer

Alveoli

Question 14

During inspiration, which muscle contracts to increase the volume of the thoracic cavity?

Accepted Answer

Diaphragm

Question 15

Which equation best represents the relationship between pressure, volume, and airflow in the respiratory system?

Accepted Answer

$$ P 	imes V = constant $$

Question 16

A patient with chronic obstructive pulmonary disease (COPD) has difficulty exhaling. Which of the following best explains this symptom?

Accepted Answer

Decreased elasticity of alveolar walls

Question 17

Which chemical factor most strongly stimulates an increase in respiratory rate?

Accepted Answer

Increased carbon dioxide concentration

Question 18

Which of the following best describes the role of surfactant in the lungs?

Accepted Answer

It reduces surface tension in alveoli

Question 19

A patient is exposed to high altitude, where oxygen levels are lower. Which physiological response is most likely to occur?

Accepted Answer

Increased respiratory rate

Question 20

Which of the following best explains why carbon monoxide poisoning is dangerous?

Accepted Answer

Carbon monoxide binds to hemoglobin more strongly than oxygen

Anatomy & Physiology: Blood, Heart, Blood Vessels, and Respiratory System Study Guide

Study Guide - Practice Questions