Control of the Heart Beat Quiz

What are pacemaker cells in the heart responsible for?

• Initiating electrical impulses for heart rhythm

• Storing excess glucose

• Producing red blood cells

• Regulating blood pressure

Where are pacemaker cells located in the heart?

• Sinoatrial node (SA node)

• Left ventricle

• Pulmonary artery

• Atrioventricular node (AV node)

What is the main pacemaker of the heart?

• SA node

• Left ventricle

• Aorta

• Pulmonary artery

What is the function of the sinoatrial node?

• Regulating blood pressure

• Initiating electrical impulses for heart rhythm

• Producing red blood cells

• Digesting food

What is the role of the atrioventricular node in the heart's electrical conduction system?

• Delays the electrical impulse to allow the atria to contract before the ventricles

• Sends electrical impulses to the lungs

• Causes the heart to stop beating

• Regulates blood pressure in the arteries

How do pacemaker cells generate electrical impulses?

• By releasing hormones into the bloodstream

• Through the process of photosynthesis

• Through the movement of ions across their cell membranes

• By contracting and relaxing in response to external stimuli

What is the significance of pacemaker cells in regulating heart rate?

• Pacemaker cells generate electrical impulses to regulate the heart rate.

• Pacemaker cells help in digestion

• Pacemaker cells store blood in the heart

• Pacemaker cells regulate body temperature

What happens if the pacemaker cells malfunction?

• Increased blood flow to the heart

• Irregular heartbeats or arrhythmias

• Decreased blood pressure

• Improved lung function

How do pacemaker cells coordinate the contraction of the heart muscles?

• By physically pushing the heart muscles to contract

• By controlling the temperature of the heart

• By releasing hormones into the bloodstream

• By generating electrical signals that spread through the heart

What are the factors that can affect the activity of pacemaker cells?

• Food intake, exercise, and sleep patterns

• Music, TV shows, and social media usage

• Autonomic nervous system input, hormones, and electrolyte levels

• Temperature, humidity, and air pressure