Question 1

Which of the following best describes the function of the right side of the heart?

Accepted Answer

It receives deoxygenated blood from the body and pumps it to the lungs via the pulmonary circuit.

Question 2

A patient is diagnosed with cardiac tamponade. Which layer of the heart is directly involved in this condition?

Accepted Answer

Pericardium

Question 3

Which of the following correctly matches the heart valve with its location and function?

Accepted Answer

The pulmonary semilunar valve is located between the right ventricle and pulmonary trunk, preventing backflow into the ventricle.

Question 4

A myocardial infarction (heart attack) is most likely caused by which of the following?

Accepted Answer

A blockage in the coronary arteries

Question 5

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

Accepted Answer

$$F = \Delta P / R$$

Question 6

A patient with left-sided heart failure is most likely to experience which of the following symptoms?

Accepted Answer

Pulmonary congestion due to fluid accumulation in the lungs

Question 7

Which of the following best explains why cardiac muscle cells have a longer absolute refractory period than skeletal muscle cells?

Accepted Answer

Cardiac muscle cells require extracellular calcium for contraction, prolonging depolarization.

Question 8

During the cardiac cycle, which event is responsible for the 'dup' sound heard through a stethoscope?

Accepted Answer

Closure of the semilunar valves

Question 9

Which of the following is a correct calculation for mean arterial pressure (MAP)?

Accepted Answer

$$MAP = Diastolic\ Pressure + (Pulse\ Pressure / 3)$$

Question 10

A patient with a blood pressure of 120/80 mmHg has a pulse pressure of:

Accepted Answer

$$40\ mmHg$$

Question 11

Which type of capillary is most likely to be found in the liver and allows the passage of large molecules and cells?

Accepted Answer

Sinusoidal capillaries

Question 12

Which of the following best describes the function of the respiratory system?

Accepted Answer

To supply the body with $$O_2$$ for cellular respiration and dispose of $$CO_2 as a $$waste product

Question 13

Which of the following is the correct order of airflow through the respiratory tract during inspiration?

Accepted Answer

Nasal cavity → Pharynx → Larynx → Trachea → Bronchi → Alveoli

Question 14

A patient with emphysema is likely to have which of the following changes in lung compliance and gas exchange?

Accepted Answer

Increased lung compliance and decreased gas exchange

Question 15

Which of the following correctly defines vital capacity (VC) in terms of respiratory volumes?

Accepted Answer

$$VC = TV + IRV + ERV$$

Question 16

Which of the following factors would most likely increase the affinity of hemoglobin for oxygen?

Accepted Answer

Decreased $$CO_2$$ concentration

Question 17

A patient is experiencing hypovolemic shock. Which of the following is the most likely cause?

Accepted Answer

Severe blood loss resulting in decreased blood volume

Question 18

Which of the following best explains why the left ventricle has a thicker myocardium than the right ventricle?

Accepted Answer

The left ventricle pumps blood to the entire body, requiring more force.

Question 19

Which of the following is a function of the surfactant produced by type II alveolar cells?

Accepted Answer

Decreases alveolar surface tension, preventing alveolar collapse

Question 20

A patient with a tracheal obstruction is most likely to experience which of the following changes in airway resistance and ventilation?

Accepted Answer

Increased airway resistance and decreased ventilation

Cardiovascular and Respiratory Systems: Anatomy & Physiology Study Guide

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