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Heart Physiology and Cardiac Function Quiz

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#1

Which chamber of the heart receives oxygenated blood from the lungs?

Left atrium
Explanation

Receives oxygen-rich blood from pulmonary veins.

#2

What is the name of the valve located between the left atrium and left ventricle?

Mitral valve
Explanation

Regulates blood flow between left atrium and ventricle.

#3

Which of the following structures carries deoxygenated blood from the heart to the lungs?

Pulmonary artery
Explanation

Transports oxygen-poor blood to lungs for oxygenation.

#4

What is the term for the relaxation phase of the cardiac cycle?

Diastole
Explanation

Heart muscle relaxation and chamber filling.

#5

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

Regulating body temperature
Explanation

Heart does not regulate body temperature.

#6

What is the name of the large artery that carries oxygenated blood away from the heart to the rest of the body?

Aorta
Explanation

Main artery distributing oxygen-rich blood.

#7

What is the function of the sinoatrial (SA) node in the heart?

To generate the heart's rhythmic electrical impulses
Explanation

Initiates electrical signals for heart contraction.

#8

Which of the following is responsible for the contraction of cardiac muscle cells?

Autonomic nervous system
Explanation

Controls involuntary heart muscle contractions.

#9

What is the term for the volume of blood pumped out by each ventricle with each beat of the heart?

Stroke volume
Explanation

Amount of blood ejected per heartbeat.

#10

What is the term for the period of ventricular contraction and blood ejection?

Systole
Explanation

Phase of heart contraction and blood expulsion.

#11

Which of the following factors can increase cardiac output?

Increased heart rate
Explanation

Elevated heart rate boosts blood pumped per minute.

#12

Which of the following is NOT a risk factor for cardiovascular disease?

Regular exercise
Explanation

Regular exercise lowers risk of heart disease.

#13

Which hormone is released by the adrenal gland and increases heart rate and blood pressure during times of stress?

Epinephrine (adrenaline)
Explanation

Boosts heart rate and blood pressure in stress.

#14

What is the term for the volume of blood remaining in each ventricle after contraction?

End-diastolic volume
Explanation

Blood volume in ventricles after contraction.

#15

Which of the following conditions is characterized by a rapid heartbeat that starts in the ventricles?

Ventricular fibrillation
Explanation

Chaotic ventricular contractions impairing blood flow.

#16

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

Producing hormones
Explanation

Pericardium doesn't produce hormones.

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