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Cardio: the Heart
Cardiovascular System: Chapter quizzes
| Question | Answer |
|---|---|
| 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 |
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ashleyc_m
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