AAOS EMT Chapter 16 Cardiovascular Emergencies Questions and Answers 100% Pass

AAOS EMT Chapter 16 Cardiovascular Emergencies Questions and Answers 100% Pass Deoxygenated blood from the body returns to the: A. right atrium. B. right ventricle. C. left atrium. D. left ventricle. A. right atrium. Blood that is ejected from the right ventricle: A. enters the systemic circulation. B. flows into the pulmonary arteries. C. has a high concentration of oxygen. D. was received directly from the aorta. B. flows into the pulmonary arteries. Which of the following blood vessels transports oxygenated blood? A. superior vena cava B. pulmonary arteries C. inferior vena cava D. pulmonary veins D. pulmonary veins What is the function of the left atrium? A. It ejects oxygenated blood into the aorta. B. It receives oxygenated blood from the lungs. C. It receives blood from the pulmonary arteries. D. It receives oxygenated blood from the vena cava. B. It receives oxygenated blood from the lungs. 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. C. pumps blood into the aorta and systemic circulation. 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. C. sinoatrial (SA) node. 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. A. blood can pass from the atria to the ventricles. 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. D. automaticity. 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. D. autonomic nervous system. 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