$$\text{Cardiac Output} = \text{Stroke Volume} \times \text{Heart Rate}$$

$$\text{MAP} = \text{CO} \times \text{TPR}$$

Question 1

Which chamber of the heart receives oxygen-poor blood from the systemic circulation?

Accepted Answer

Right atrium

Question 2

Identify the structure that prevents backflow of blood from the right ventricle to the right atrium during ventricular contraction.

Accepted Answer

Tricuspid valve

Question 3

Which vessel carries oxygen-rich blood from the lungs to the heart?

Accepted Answer

Pulmonary vein

Question 4

What is the function of the chordae tendineae visible in the image?

Accepted Answer

To anchor the atrioventricular valves and prevent prolapse during ventricular contraction

Question 5

Which structure is responsible for initiating the heartbeat?

Accepted Answer

Sinoatrial (SA) node

Question 6

During systole, which heart chamber contracts to send blood into the pulmonary circuit?

Accepted Answer

Right ventricle

Question 7

Which layer of the heart wall is responsible for the contractile force of the heart?

Accepted Answer

Myocardium

Question 8

If a blood clot blocks the left coronary artery, which region of the heart is most likely to be affected?

Accepted Answer

Left ventricle

Question 9

Which equation best represents the relationship between cardiac output, heart rate, and stroke volume?

Accepted Answer

$$	ext{Cardiac Output} = 	ext{Stroke Volume} 	imes 	ext{Heart Rate}$$

Question 10

Which vessel returns oxygen-poor blood from the lower body to the right atrium?

Accepted Answer

Inferior vena cava

Question 11

Which valve prevents backflow of blood from the pulmonary artery into the right ventricle?

Accepted Answer

Pulmonary semilunar valve

Question 12

Which structure separates the left and right ventricles?

Accepted Answer

Interventricular septum

Question 13

Which of the following best describes the flow of blood through the heart?

Accepted Answer

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

Question 14

Which equation describes the pressure gradient driving blood flow through the heart?

Accepted Answer

$$\Delta P = Q 	imes R$$

Question 15

Which structure is most likely to be damaged in mitral valve prolapse?

Accepted Answer

Bicuspid (mitral) valve

Question 16

Which of the following is NOT a function of the heart?

Accepted Answer

Synthesizing hormones

Question 17

Which structure is responsible for preventing the atrioventricular valves from inverting during ventricular contraction?

Accepted Answer

Papillary muscles

Question 18

Which equation best represents the relationship between mean arterial pressure (MAP), cardiac output (CO), and total peripheral resistance (TPR)?

Accepted Answer

$$	ext{MAP} = 	ext{CO} 	imes 	ext{TPR}$$

Question 19

Which structure is visible in the image and is responsible for separating the right atrium from the right ventricle?

Accepted Answer

Tricuspid valve

Question 20

Which of the following best describes the function of the pericardium?

Accepted Answer

To anchor the heart and provide a frictionless environment

Understanding the Structure of the Human Heart

Study Guide - Practice Questions