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Cardio: the Heart

Cardiovascular System: Chapter quizzes

QuestionAnswer
Which of the following would lead to a decreased heart rate? a) increased norepinephrine release b) increased thyroid hormone release c) increased potassium levels in plasma d) increased calcium levels in plasma e) increased sympathetic stimulation C) increased potassium levels in plasma
Which of the following chambers of the heart is surrounded by the thickest layer of myocardium? Left Ventricle
This is a network of specialized cardiac muscle fibers that provide a path for each cycle of cardiac excitation to progress through the heart Cardiac Conduction system
Which wave in an electrocardiogram represents repolarization of the ventricles? T wave
Cardiac muscle fibers are electrically connected to neighboring fibers by ___ Gap junctions
Contraction of the atria of the heart leads to blood moving directly ___. a) into auricles b) into arteries c) into veins d) through atrioventricular valves e) through semilunar valves D) through atrioventricular valves
What type of tissue comprises the valves of the heart? Dense connective tissue
The process of listening to heart sounds using a stethoscope is referred to as __. Ausculation
During heart transplants, the ____ nerves are severed resulting in a faster resting heart rate (approximately 100 bpm) after the transplant. a) glossopharyngeal b) cardiac accelerator c) vagus d) phrenic e) cervical spinal C) Vagus
Created by: ashleyc_m