NEX Anatomy and Physiology: The Cardiovascular System 2

Question 1

Which valve separates the left atrium from the left ventricle?

Accepted Answer

Mitral (bicuspid) valve

Answer

The mitral valve, also called the bicuspid valve, is positioned between the left atrium and left ventricle to prevent backflow of blood during ventricular contraction.

Question 2

What is the normal resting cardiac output for an average adult?

Accepted Answer

5-6 liters per minute

Answer

Normal resting cardiac output is approximately 5-6 liters per minute, calculated as stroke volume multiplied by heart rate.

Question 3

The sinoatrial (SA) node is located in which chamber of the heart?

Accepted Answer

Right atrium

Answer

The SA node, the heart's natural pacemaker, is located in the upper wall of the right atrium near the superior vena cava.

Question 4

Which blood vessel carries deoxygenated blood from the heart to the lungs?

Accepted Answer

Pulmonary artery

Answer

The pulmonary artery carries deoxygenated blood from the right ventricle to the lungs for gas exchange, making it the only artery that carries deoxygenated blood.

Question 5

What does an elevated troponin level in the blood most commonly indicate?

Accepted Answer

Myocardial injury

Answer

Elevated troponin levels are the most sensitive and specific biomarker for myocardial injury, commonly used to diagnose acute myocardial infarction.

(NEX) Nursing Entrance Exam Practice Test

(NEX) Nursing Entrance Exam Practice Test

NEX Anatomy and Physiology: The Cardiovascular System 2