Normally, the rate of the heart beat in a human is

ATI RN

ATI RN Test Bank

Normally, the rate of the heart beat in a human is determined by:

A. Bundle of His B. all cardiac muscles C. the SA node D. the cervical ganglion

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

In the case of heart muscle, all are true except:

A. has striations B. has intercalated discs with nuclei C. has gap junctions D. has branching

Correct Answer: B

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

What of the following chambers of the heart contain deoxygenated blood?

A. Left atrium and left ventricle B. Left atrium only C. Right atrium and right ventricle D. Right ventricle only

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Which of the following electrocardiogram (EKG) waves represents atrial depolarization?

A. R wave B. T wave C. S wave D. P wave

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Blood vessel into which the right ventricle pumps blood through a semilunar valve

A. Aorta B. Pulmonary artery C. Coronary artery D. Superior vena cava

Correct Answer: B

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

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