Biology

Cardiovascular and Nervous System

981 Questions

Review the human cardiovascular system through these competitive exam practice questions. Key areas include heart valves, cardiac impulse pathways, and blood pressure regulation. A solid grasp of these fundamentals is crucial for science sections.

Heart anatomy and valvesCardiac impulse conductionBlood pressure mechanicsHeartbeat regulation

Cardiovascular and Nervous System Questions

Multiple choice

What is the function of bundle of His?

  1. It relays cardiac impulses to the ventricular cells.

  2. It transmits impulses from the atrioventricular node.

  3. It plays a role in the regulation of heartbeat/rhythm.

  4. It initiates the nerve impulse.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The bundle of His is an important part of the electrical conduction system of the heart as it transmits impulses from the atrioventricular node.

Multiple choice

What is the difference between pulse rate and heart rate?

  1. They are numerically different.

  2. They are one and the same.

  3. Pulse is the expansion and contraction of artery, whereas heart rate is contraction and relaxation of heart muscles.

  4. Pulse rate doesn't change with strenuous exercise, whereas heart rate increases with vigorous exercise.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The difference is that pulse is expansion and contraction of artery, whereas heart rate is contraction and relaxation of heart muscles.

Multiple choice

Which of the following statements is false about the heart?

  1. The heart is slightly tilted towards left.

  2. The heart is about the size of fist.

  3. The heart is located on the left side of your chest.

  4. Feelings do affect the heart.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is a myth. In actuality, the heart is located in the middle of your chest and sits between lungs. The bottommost part of the heart is slightly tipped to the left but the heart is really in the center of your chest.

Multiple choice

Where is the mitral valve located?

  1. Between the right atrium and the left ventricle

  2. Between the left atrium and the left ventricle

  3. Between the right ventricle and the pulmonary aorta

  4. Between the right and the left ventricles
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The mitral valve guards the opening between the left atrium and the left ventricle.

Multiple choice

The number of chambers in a human heart is

  1. 4

  2. 2

  3. 3

  4. 5
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The human heart consists of four chambers: two atria (upper chambers) and two ventricles (lower chambers). This structure allows for the separation of oxygenated and deoxygenated blood.

Multiple choice

Which part of the heart has the thickest wall?

  1. Left auricle

  2. Right auricle

  3. Left ventricle

  4. Right ventricle

  5. -
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The walls of the left ventricle are about three times thicker than the right ventricle as it has to supply the blood more forcefully to the large diameter of aorta.