Understanding EKG Ch. 2 Exam with Complete Solutions

The left side of the heart is a low-pressure pump. a. True b. False - ANSWER-b. False The major blood vessel that receives blood from the head and upper extremities and transports it to the heart is the: a. Trunk of the aorta c. Inferior vena cava b. Superior vena cava d. Pulmonary artery - ANSWER-c. Inferior vena cava The course of blood flow through the heart and lungs is referred to as _______ circulation. a. Aortic c. Systemic b. Pulmonary d. Collateral - ANSWER- Cardiac output is a factor of which of the following elements? a. Cardiac rate b. Stroke volume c. Partial vascular resistance d. Both a and b - ANSWER-d. Both a and b The chief chemical neurotransmitter for the parasympathetic nervous system is: a. Acetylcholine c. Epinephrine b. Norepinephrine d. Atropine - ANSWER-a. Acetylcholine It is important to note that blood vessels are innervated only by the ________ nervous system. a. Adrenergic c. Sympathetic b. Parasympathetic d. Cholinergic - ANSWER-c. Sympathetic The chief chemical neurotransmitter for the sympathetic nervous system is: a. Acetylcholine c. Ephedrine b. Norepinephrine d. Atropine - ANSWER-b. Norepinephrine