Ventricular depolarization 

Failure of the SA node to depolarize would result in an ECG lacking

Within the blood vessels, valves are found in the 

MOST of the circulating blood can be found in 

bradycardia is

which of the following could indicate a recent MI?

Ventricular fibrillation

the cardiac output is equal to the

Norepinephrine, released from __________ nerves, causing heart rate to ______.

Norepinephrine and epinephrine open ____ channels inducing a faster pacemaker cell depolarization. 

Acetylcholine binds to _______ receptors of the heart and causes the opening of ___ channels.

sympathetic stimulation of the heart

The ejection fraction is 

As cardiac muscle is stretched, it contracts

__________ is a steroid hormone secreted by the adrenal cortex which stimulates kidney salt reabsorption in the kidneys. 

Which of the following is NOT a action of angiotensin II to raise blood pressure?

Blood flow is increased by 

______ caused by nitric oxide would be an example of paracrine regulation

What allows cardiac muscle to have sufficient oxygen during systole?  

The last Korotkoff sound occurs when the blood pressure is equal to 

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