EMT CHAPTER 14 QUIZ | COMPLETE STUDY
GUIDE & PRACTICE QUESTIONS
| GRADED A+ | GUARANTEED SUCCESS
Updated 2026 Questions and Answers
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,1. Deoxygenated blood from the body returns to the: Answer: A. right atrium.
A. right atrium.
B. right ventricle. from the inferior (lower body) and superior (head & upper body) vena cava.
C. left atrium.
D. left ventricle.
Question Type: General Knowledge
Page: 526
2. Blood that is ejected from the right ventricle: Answer: B. flows into the pulmonary arteries.
A. enters the systemic circulation.
B. flows into the pulmonary arteries. Question Type: General Knowledge
C. has a high concentration of oxygen. Page: 526
D. was received directly from the aorta
3. Which of the following blood vessels transports Answer: D. pulmonary veins
oxygenated blood?
A. superior vena cava Question Type: General Knowledge
B. pulmonary arteries Page: 526
C. inferior vena cava
D. pulmonary veins
,4. What is the function of the left atrium? Answer: B. It receives oxygenated blood from the lungs.
A. It ejects oxygenated blood into the aorta.
B. It receives oxygenated blood from the lungs. Question Type: General Knowledge
C. It receives blood from the pulmonary arteries. Page: 526
D. It receives oxygenated blood from the vena cava
5. The left ventricle has the thickest walls because it: Answer: C. pumps blood into the aorta and systemic circulation.
A. pumps blood to the lungs to be reoxygenated.
B. uses less oxygen than other chambers of the heart. Question Type: General Knowledge
C. pumps blood into the aorta and systemic circulation. Page: 526
D. receives blood directly from the systemic circulation.
6. The electrical impulse generated by the heart Answer: C. sinoatrial (SA) node.
originates in the:
A. bundle of His. Question Type: General Knowledge
B. coronary sinus. Page: 526
C. sinoatrial (SA) node.
D. atrioventricular (AV) node.
, 7. When an electrical impulse reaches the AV node, it is Answer: A. blood can pass from the atria to the ventricles
slowed for a brief period of time so that:
A. blood can pass from the atria to the ventricles. Question Type: General Knowledge
B. blood returning from the body can fill the atria. Page: 526
C. the impulse can spread through the Purkinje fibers.
D. the SA node can reset and generate another impulse.
8. The ability of cardiac muscle cells to contract Answer: D. automaticity.
spontaneously without a stimulus from a nerve source is Question Type: General Knowledge
called: Page: 526
A. excitability.
B. contractility.
C. impulsivity.
D. automaticity.
9. The electrical stimulus that originates in the heart's Answer: D. autonomic nervous system.
primary pacemaker is controlled by impulses from the
brain that arrive by way of the: Question Type: General Knowledge
A. parietal lobe. Page: 526
B. pons and medulla.
C. somatic nervous system.
D. autonomic nervous system.
GUIDE & PRACTICE QUESTIONS
| GRADED A+ | GUARANTEED SUCCESS
Updated 2026 Questions and Answers
100% Verified Exam Prep
,1. Deoxygenated blood from the body returns to the: Answer: A. right atrium.
A. right atrium.
B. right ventricle. from the inferior (lower body) and superior (head & upper body) vena cava.
C. left atrium.
D. left ventricle.
Question Type: General Knowledge
Page: 526
2. Blood that is ejected from the right ventricle: Answer: B. flows into the pulmonary arteries.
A. enters the systemic circulation.
B. flows into the pulmonary arteries. Question Type: General Knowledge
C. has a high concentration of oxygen. Page: 526
D. was received directly from the aorta
3. Which of the following blood vessels transports Answer: D. pulmonary veins
oxygenated blood?
A. superior vena cava Question Type: General Knowledge
B. pulmonary arteries Page: 526
C. inferior vena cava
D. pulmonary veins
,4. What is the function of the left atrium? Answer: B. It receives oxygenated blood from the lungs.
A. It ejects oxygenated blood into the aorta.
B. It receives oxygenated blood from the lungs. Question Type: General Knowledge
C. It receives blood from the pulmonary arteries. Page: 526
D. It receives oxygenated blood from the vena cava
5. The left ventricle has the thickest walls because it: Answer: C. pumps blood into the aorta and systemic circulation.
A. pumps blood to the lungs to be reoxygenated.
B. uses less oxygen than other chambers of the heart. Question Type: General Knowledge
C. pumps blood into the aorta and systemic circulation. Page: 526
D. receives blood directly from the systemic circulation.
6. The electrical impulse generated by the heart Answer: C. sinoatrial (SA) node.
originates in the:
A. bundle of His. Question Type: General Knowledge
B. coronary sinus. Page: 526
C. sinoatrial (SA) node.
D. atrioventricular (AV) node.
, 7. When an electrical impulse reaches the AV node, it is Answer: A. blood can pass from the atria to the ventricles
slowed for a brief period of time so that:
A. blood can pass from the atria to the ventricles. Question Type: General Knowledge
B. blood returning from the body can fill the atria. Page: 526
C. the impulse can spread through the Purkinje fibers.
D. the SA node can reset and generate another impulse.
8. The ability of cardiac muscle cells to contract Answer: D. automaticity.
spontaneously without a stimulus from a nerve source is Question Type: General Knowledge
called: Page: 526
A. excitability.
B. contractility.
C. impulsivity.
D. automaticity.
9. The electrical stimulus that originates in the heart's Answer: D. autonomic nervous system.
primary pacemaker is controlled by impulses from the
brain that arrive by way of the: Question Type: General Knowledge
A. parietal lobe. Page: 526
B. pons and medulla.
C. somatic nervous system.
D. autonomic nervous system.
