Question
Wed April 13, 2011 By:
 

What is the difference in the working of smooth muscle cells and cardiac muscle cells, when they both are involuntary?????

Expert Reply
Thu April 14, 2011
Cardiac and smooth muscle can both generate force to move or hold back the contents of the body cavities they surround. Cardiac muscle essentially pumps blood, and smooth muscle is responsible for the rhythmic contractions that move contents in your digestive tract, uterine tubes or ureters. Compared to cardiac muscle, it responds more slowly to signals from autonomic nervous system. However, smooth muscle is able to contract for longer periods of time and can stretch more than cardiac muscle without suffering injury. Cardiac muscles contract rythmically from birth to death. Their contractions are more forceful than smooth muscles.

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