Cardiovascular System Overview

What is the function of the Atrioventricular (AV) Node?

• Conducts impulses to ventricles.

• Regulates heart rate by controlling the speed of impulses.

• Pumps blood to the lungs for oxygenation.

• Transmits electrical signals to the atria.

What is the normal heart rate range?

• 50–80 bpm (beats per minute)

• 60–100 bpm (beats per minute)

• 70–110 bpm (beats per minute)

• 80–120 bpm (beats per minute)

What are blood pressure cuffs called?

• Sphygmomanometers

• Stethoscopes

• Thermometers

• Oximeters

What is vasodilation?

• Contraction of blood vessels.

• Expanding of blood vessels.

• Narrowing of airways.

• Thickening of blood walls.

What is the aorta?

• The largest artery.

• A type of vein.

• A muscle in the heart.

• A blood cell type.

Name three factors aiding venous return.

• Skeletal muscle contractions, Diaphragm movement (breathing), Valves in veins

• Increased blood pressure, High salt intake, Sedentary lifestyle

• Dehydration, High cholesterol, Smoking

• Excessive exercise, Low protein diet, Cold temperatures

What is an aneurysm?

• Weakening in a blood vessel wall, risk of rupture.

• Inflammation of a blood vessel.

• Blockage in a blood vessel leading to tissue death.

• Abnormal growth of tissue in the heart.

What is arrhythmia?

• Regular heartbeat

• Irregular heartbeat.

• Fast heartbeat

• Slow heartbeat

What is tachycardia?

• A condition characterized by a slow heart rate.

• Abnormally fast heart rate.

• A type of heart disease.

• A symptom of high blood pressure.

What is a defibrillator?

• A device that delivers an electric shock to restore normal heart rhythm.

• A machine used to measure blood pressure.

• A tool for performing CPR effectively.

• A device that monitors heart rate continuously.