Define the autonomic nervous system
What will be an ideal response?
Involuntary portion of the peripheral nervous system.
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An incompetent mitral valve may cause blood to back up into the
A. aorta. B. left atrium. C. left ventricle. D. coronary circulation. E. right atrium.
An inflammation of the membrane that lines the heart and covers the valves is called
Fill in the blank(s) with the appropriate word(s).
Compare concentric and eccentric contractions
A) Concentric contractions consist of equal lengths of time contracting and relaxing. Eccentric contractions consist of a longer time contracting than relaxing. B) Concentric contractions consist of equal lengths of time contracting and relaxing. Eccentric contractions consist of a longer time relaxing than contracting. C) Concentric contractions occur when the tension produced never exceeds the load, and the muscle does not change length. Eccentric contractions occur when the tension produced exceeds the load, and the muscle shortens. D) Concentric contractions occur when the muscle tension exceeds the load, and the muscle shortens. Eccentric contractions occur when the muscle tension is less than the load, and the muscle elongates. E) Concentric contractions occur when the muscle tension is less than the load, and the muscle elongates. Eccentric contractions occur when the muscle tension exceeds the load, and the muscle shortens.
Which system produces chemical messengers known as hormones?
A) nervous system B) immune system C) endocrine system D) integumentary system E) muscular system