BIOL 252 Human Anatomy & Physiology II w/Lab {NEW VERSION }| Module 2 Exam Review 70+ Practice Questions & Answers -Summary | LockDown Browser | Portage Learning

BIOL 252 Human Anatomy & Physiology II w/Lab
{NEW VERSION }| Module 2 Exam Review 70+ Practice
Questions & Answers -Summary | LockDown Browser
| Portage Learning

Format: Multiple Choice, True/False, Fill-in-the-Blank

Topic: Cardiovascular System – The Heart
Course: Portage Learning BIOL 252
Exam Type: LockDown Browser



SECTION 1: HEART ANATOMY & STRUCTURE (Questions 1–25)



Question 1
pts
The innermost layer of the heart wall, which lines the chambers and covers the
valves, is the:

A) Epicardium
B) Myocardium
C) Endocardium
D) Pericardium

Answer: C) Endocardium
The endocardium is the inner lining of the heart chambers and valves. The myocardium is

,the cardiac muscle layer, the epicardium is the visceral pericardium, and the pericardium is
the outer sac surrounding the heart.



Question 2
pts
Which valve prevents backflow from the left ventricle into the left atrium?

A) Tricuspid valve
B) Pulmonary valve
C) Mitral (bicuspid) valve
D) Aortic valve

Answer: C) Mitral (bicuspid) valve
The mitral (bicuspid) valve is located between the left atrium and left ventricle. The tricuspid
valve is on the right side between the right atrium and right ventricle.



Question 3
pts
Which chamber of the heart has the thickest myocardium and why?

A) Right atrium – to receive blood from the body
B) Right ventricle – to pump blood to the lungs
C) Left atrium – to receive oxygenated blood from the lungs
D) Left ventricle – to pump oxygenated blood to the entire body

Answer: D) Left ventricle – to pump oxygenated blood to the entire body
The left ventricle has the thickest myocardium because it must generate enough pressure
to pump oxygenated blood through the systemic circulation to all body tissues.

,Question 4
pts
The pacemaker of the heart is the:

A) Atrioventricular (AV) node
B) Bundle of His
C) Purkinje fibers
D) Sinoatrial (SA) node

Answer: D) Sinoatrial (SA) node
The SA node is the natural pacemaker of the heart, located in the right atrium. It initiates
the electrical impulses that set the heart rate.



Question 5
pts
True or False: The pulmonary artery carries oxygenated blood to the lungs.

True
Answer
False

The pulmonary artery carries deoxygenated blood from the right ventricle to the lungs for
oxygenation. Only the pulmonary veins carry oxygenated blood back to the heart.



Question 6
pts
What is the function of the chordae tendineae?

, A) Connect the atria to the ventricles
B) Prevent the AV valve leaflets from prolapsing into the atria
C) Conduct electrical impulses through the heart
D) Supply blood to the heart muscle

Answer: B) Prevent the AV valve leaflets from prolapsing into the atria
The chordae tendineae are thin, strong cords that connect the papillary muscles to the AV
valve leaflets. They prevent the valves from inverting or prolapsing during ventricular
contraction.



Question 7
pts
True or False: The atria are the receiving chambers of the heart, and the ventricles
are the pumping chambers.

True
Answer

False
The atria receive blood returning to the heart from the body and lungs. The ventricles pump
blood out of the heart to the lungs and systemic circulation.



Question 8
pts
Which vessel(s) supply oxygenated blood to the heart muscle itself?

A) Pulmonary arteries
B) Aorta