Understanding the Cardiovascular System

The video tutorial provides an in-depth exploration of the cardiovascular system, detailing the components and functions of blood, the structure and circulation of the heart, and the regulation of the cardiac cycle. It also examines the influence of the nervous system and hormones on heart function, the impact of exercise on cardiac output, and the concept of cardiovascular drift and adaptations.

What percentage of blood is made up of plasma?

• 75%

• 45%

• 55%

• 65%

Which component of blood is responsible for clotting?

• Leucocytes

• Plasma

• Erythrocytes

• Thrombocytes

Which chamber of the heart receives deoxygenated blood from the body?

• Right Atrium

• Right Ventricle

• Left Atrium

• Left Ventricle

What is the function of the aorta?

• Carries oxygenated blood to the body

• Pumps blood to the heart

• Carries deoxygenated blood to the lungs

• Receives blood from the lungs

What is the primary function of the pulmonary circuit?

• Distribute hormones

• Regulate blood pressure

• Exchange gases in the lungs

• Transport nutrients

Which node initiates the electrical impulse in the heart?

• SA Node

• AV Node

• Bundle of His

• Purkinje Fibers

How does the sympathetic nervous system affect heart rate?

• No effect

• Regulates blood pressure

• Increases heart rate

• Decreases heart rate

What is the formula for cardiac output?

• HR + SV

• SV - HR

• HR x SV

• SV / HR

What happens to stroke volume during prolonged exercise?

• Fluctuates

• Remains constant

• Increases

• Decreases

What is cardiovascular drift?

• Sudden drop in heart rate

• Stable cardiac output

• Decrease in blood pressure

• Increase in heart rate during prolonged exercise