Store calcium for muscle contraction

Deliver oxygen to cardiac muscle tissue

Contract to pump blood through the chambers

Generate and regulate electrical impulses for heartbeats

Can contract without nervous system input

Lack striations

Do not require oxygen for energy

Fatigue quickly during prolonged activity

The circulation of blood through the lungs only

The movement of blood in the veins

One complete heartbeat, including contraction and relaxation

The electrical activity of the heart only

The heart relaxes and fills with blood

The ventricles contract and pump blood out

The atria contract to push blood into the ventricles

The heart stops beating temporarily

damage to or death of cardiac muscle tissue due to a blockage in the coronary arteries

hardening of the arteries by accumulation of fatty deposits

a failure of blood to clot

chest pain due to a partial blockage of the coronary arteries

lack of oxygen to the brain, leading to a death of nervous tissue there

left ventricle only

right atrium and right ventricle

left atrium and right atrium

left atrium only

left ventricle and left atrium

It is moving away from the heart.

It is loaded with carbon dioxide.

There is no difference; it is the same as blood in other arteries.

It is moving toward the heart.

Blood in pulmonary arteries is always blue; it is red in all other arteries.

All of the listed responses are correct.

producing mucus

producing wastes

eliminating hormones

transporting nutrients

By the size (amplitude) of individual action potentials.

By the frequency of action potentials in sensory neurons.

By the duration of a single action potential.

By the type of neurotransmitter released.

Na+/K+ ATPase pump moves 3Na+ in for every 2K+ out

Na+/K+ ATPase pump moves 3Na+ out for every 2K+ in

Na+/K+ ATPase pump moves 3K+ in for every 2Na+ out

Na+/K+ ATPase pump moves 3K+ out for every 2Na+ in