ADHS EMT CHAPTER 14 REVIEW NEWEST
EXAM 2025 WITH MULTIPLE CHOICE OF
QUESTIONS AND DETAILED SOLVED
SOLUTIONS ALREADY GRADED A+ AND 100%
GUARANTEE PASS (JUST RELEASED!!!!!!)
The left ventricle has the thickest walls because it:
A. pumps blood to the lungs to be reoxygenated.
B. uses less oxygen than other chambers of the heart.
C. pumps blood into the aorta and systemic circulation.
D. receives blood directly from the systemic circulation. -
CORRECT ANSWER-C
The electrical impulse generated by the heart originates in the:
A. bundle of His.
B. coronary sinus.
C. sinoatrial (SA) node.
D. atrioventricular (AV) node. - CORRECT ANSWER-C
When an electrical impulse reaches the AV node, it is slowed for
a brief period of time so that:
A. blood can pass from the atria to the ventricles.
,B. blood returning from the body can fill the atria.
C. the impulse can spread through the Purkinje fibers.
D. the SA node can reset and generate another impulse. -
CORRECT ANSWER-A
The ability of cardiac muscle cells to contract spontaneously
without a stimulus from a nerve source is called:
A. excitability.
B. contractility.
C. impulsivity.
D. automaticity. - CORRECT ANSWER-D
The electrical stimulus that originates in the heart's primary
pacemaker is controlled by impulses from the brain that arrive
by way of the:
A. parietal lobe.
B. pons and medulla.
C. somatic nervous system.
D. autonomic nervous system. - CORRECT ANSWER-D
Which of the following is NOT a function of the sympathetic
nervous system?
A. dilation of blood vessels in the muscles
B. constriction of blood vessels in the muscles
C. increases in the heart and respiratory rates
D. constriction of blood vessels in the digestive system - CORRECT
ANSWER-B
, In contrast to the sympathetic nervous system, the
parasympathetic nervous system:
A. prepares the body to handle stress.
B. causes an increase in the heart rate.
C. slows the heart and respiratory rates.
D. dilates the blood vessels in the muscles. - CORRECT ANSWER-C
When the myocardium requires more oxygen:
A. the heart contracts with less force.
B. the arteries supplying the heart dilate.
C. the heart rate decreases significantly.
D. the AV node conducts fewer impulses. - CORRECT ANSWER-B
The myocardium receives oxygenated blood from the
__________, which originate(s) from the __________.
A. coronary sinus, vena cava
B. aorta, inferior vena cava
C. vena cava, coronary veins
D. coronary arteries, aorta - CORRECT ANSWER-D
Which of the following would cause the greatest increase in
cardiac output?
A. increased heart rate and increased stroke volume
B. decreased stroke volume and increased heart rate
C. decreased heart rate and increased stroke volume
EXAM 2025 WITH MULTIPLE CHOICE OF
QUESTIONS AND DETAILED SOLVED
SOLUTIONS ALREADY GRADED A+ AND 100%
GUARANTEE PASS (JUST RELEASED!!!!!!)
The left ventricle has the thickest walls because it:
A. pumps blood to the lungs to be reoxygenated.
B. uses less oxygen than other chambers of the heart.
C. pumps blood into the aorta and systemic circulation.
D. receives blood directly from the systemic circulation. -
CORRECT ANSWER-C
The electrical impulse generated by the heart originates in the:
A. bundle of His.
B. coronary sinus.
C. sinoatrial (SA) node.
D. atrioventricular (AV) node. - CORRECT ANSWER-C
When an electrical impulse reaches the AV node, it is slowed for
a brief period of time so that:
A. blood can pass from the atria to the ventricles.
,B. blood returning from the body can fill the atria.
C. the impulse can spread through the Purkinje fibers.
D. the SA node can reset and generate another impulse. -
CORRECT ANSWER-A
The ability of cardiac muscle cells to contract spontaneously
without a stimulus from a nerve source is called:
A. excitability.
B. contractility.
C. impulsivity.
D. automaticity. - CORRECT ANSWER-D
The electrical stimulus that originates in the heart's primary
pacemaker is controlled by impulses from the brain that arrive
by way of the:
A. parietal lobe.
B. pons and medulla.
C. somatic nervous system.
D. autonomic nervous system. - CORRECT ANSWER-D
Which of the following is NOT a function of the sympathetic
nervous system?
A. dilation of blood vessels in the muscles
B. constriction of blood vessels in the muscles
C. increases in the heart and respiratory rates
D. constriction of blood vessels in the digestive system - CORRECT
ANSWER-B
, In contrast to the sympathetic nervous system, the
parasympathetic nervous system:
A. prepares the body to handle stress.
B. causes an increase in the heart rate.
C. slows the heart and respiratory rates.
D. dilates the blood vessels in the muscles. - CORRECT ANSWER-C
When the myocardium requires more oxygen:
A. the heart contracts with less force.
B. the arteries supplying the heart dilate.
C. the heart rate decreases significantly.
D. the AV node conducts fewer impulses. - CORRECT ANSWER-B
The myocardium receives oxygenated blood from the
__________, which originate(s) from the __________.
A. coronary sinus, vena cava
B. aorta, inferior vena cava
C. vena cava, coronary veins
D. coronary arteries, aorta - CORRECT ANSWER-D
Which of the following would cause the greatest increase in
cardiac output?
A. increased heart rate and increased stroke volume
B. decreased stroke volume and increased heart rate
C. decreased heart rate and increased stroke volume
