2444, Anatomy review

What is the primary pacemaker of the heart?

• A. Atrioventricular (AV) Node

• B. His-Purkinje System

• C. Sinoatrial (SA) Node

• D. Left Atrium

Where does deoxygenated blood return to the heart from the body?

• A. Left Atrium

• B. Right Atrium

• C. Left Ventricle

• D. Right Ventricle

What is the intrinsic rate of the Atrioventricular (AV) Node?

• A. 20-40 bpm

• B. 40-60 bpm

• C. 60-100 bpm

• D. 100-120 bpm

Which part of the heart contracts to push blood through the pulmonary valve into the pulmonary artery?

• A. Left Atrium

• B. Right Atrium

• C. Left Ventricle

• D. Right Ventricle

What is the function of the AV node in the heart?

• A. It serves as the primary pacemaker of the heart.

• B. It delays electrical impulses so the atria can empty into the ventricles.

• C. It contracts to push blood into the aorta.

• D. It absorbs oxygen in the lungs.

What is the primary function of the Bundle of His?

• To initiate the contraction of the heart muscle

• To transmit electrical impulses from the AV node to the ventricles

• To prevent backflow of blood during ventricular contraction

• To conduct impulses to the right and left ventricles

What maintains the depolarization phase in heart muscle cells?

• Sodium ions

• Potassium ions

• Calcium

• Magnesium

Which system is responsible for increasing the heart rate and the force of contraction?

• Parasympathetic Nervous System

• Sympathetic Nervous System

• Central Nervous System

• Peripheral Nervous System

What is the primary function of the right side of the heart?

• To pump oxygen-rich blood to the body

• To receive oxygen-poor blood from the body and pump it to the lungs

• To regulate blood pressure

• To store blood

Which side of the heart operates under lower pressure?

• Left side

• Right side

• Both sides operate under the same pressure

• Neither side operates under pressure