Which one of the following is the character of Cardiac Muscles?
Correct answer: C. Self excitatory or myogenic
- A. Made up of unstriated and branched cells
- B. Voluntary in action
- C. Self excitatory or myogenic
- D. Striated and unbranched
Explanation
Unlike skeletal muscle, which contracts in response to nerve stimulation, and like single-unit smooth muscle, cardiac muscle is myogenic, meaning that it is self-excitable stimulating contraction without a requisite electrical impulse coming from the central nervous system.
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The circulatory system covers the chambers, valves and conducting pathway of the human heart, along with the cardiac cycle and control of heartbeat. It compares arteries, veins and capillaries by structure and function, and explains how the lymphatic system returns tissue fluid, transports absorbed fats and supports immunity.
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