HESI Anatomy And Physiology Practice Test 2

Question 1

What would happen if the phrenic nerve was injured?

Accepted Answer

Inability to control one's breathing

Answer

The phrenic nerve is crucial for respiration as it innervates the diaphragm, the primary muscle responsible for breathing. It transmits motor commands that cause the diaphragm to contract and relax, facilitating inhalation and exhalation. Therefore, an injury to the phrenic nerve would impair or halt the diaphragm's function, leading to an inability to control one's breathing.

Question 2

Which valve is in charge of stopping blood from flowing backward from the right ventricle to the right atrium?

Accepted Answer

Tricuspid valve

Answer

The tricuspid valve is located between the right atrium and the right ventricle of the heart. Its essential function is to prevent the backflow of deoxygenated blood from the right ventricle into the right atrium when the ventricle contracts. This ensures that blood flows in the correct direction towards the pulmonary artery.

Question 3

Which kind of circulation is connected with the right side of the heart?

Accepted Answer

Pulmonary circulation

Answer

The right side of the heart is responsible for receiving deoxygenated blood from the body and pumping it to the lungs. This specific circulatory pathway, which involves the heart sending blood to the lungs for oxygenation and then receiving it back, is known as pulmonary circulation. Systemic circulation, conversely, involves the left side of the heart pumping oxygenated blood to the rest of the body.

Question 4

Which of the following does the diaphragm perform during exhalation?

Accepted Answer

Relaxes and lifts

Answer

During exhalation, the diaphragm relaxes and moves upwards, or lifts, into the thoracic cavity. This upward movement decreases the volume of the chest cavity, which in turn increases the pressure within the lungs, forcing air out. In contrast, during inhalation, the diaphragm contracts and flattens.

Question 5

A person with AB- blood should not receive blood from which other blood type?

Accepted Answer

AB+

Answer

A person with AB- blood has A and B antigens but lacks the Rh factor. They can safely receive blood from A-, B-, O-, and AB- donors. However, they cannot receive AB+ blood because it contains the Rh antigen, which their immune system would recognize as foreign and attack, leading to a severe transfusion reaction.

HESI (ATI) Practice Test

HESI (ATI) Practice Test

HESI Anatomy And Physiology Practice Test 2