PBS 4.1 & 4.2

How many chambers are in the human heart?

• one

• two

• three

• four

Arteries carry blood ______ the heart.

• toward

• near

• away from

• outside

Veins carry blood _________ the heart.

• toward

• near

• away from

• outside

What is the purpose of valves in the heart?

• to push blood forward

• to carry oxygenated blood to the body

• to prevent blood from flowing backwards

• to carry oxygenated blood to the heart

Which of the following is the measure of the number of times the heart beats in a minute?

• blood pressure

• electrocardiogram (EKG)

• heart rate

• biopsy

Which of the following is a measure of the electrical activity in the heart?

• blood pressure

• electrocardiogram (EKG)

• heart rate

• biopsy

What is the effect of narrowed arteries on a person's blood flow and pressure?

• increased blood flow and increased pressure

• decreased blood flow and increased pressure

• increased blood flow and decreased pressure

• decreased blood flow and decreased pressure

Which structure is the pacemaker of the heart?

• sinoatrial (SA) node

• right atrium

• right ventricle

• atrioventricular (AV) node

The right side of the heart contains ________blood and the left side of the heart _______ blood.

• oxygenated, deoxygenated

• deoxygenated, deoxygenated

• deoxygenated, oxygenated

• oxygenated, oxygenated

The wall of the _____ is thicker because it has to pump blood to the whole body.

• right atrium

• right ventricle

• left atrium

• left ventricle