Which of the following statements is incorrect
A) When sarcomeres are fully shortened, contraction cannot occur
B) When sarcomeres are slightly less than fully shortened, contraction cannot occur
C) Sarcomeres can produce the most tension when stimulated over a relatively wide range of resting lengths
D) When the muscle is fully stretched, contraction cannot occur
E) All sarcomeres in a muscle fiber contract and relax together
C) Sarcomeres can produce the most tension when stimulated over a relatively wide range of resting lengths
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What structural features of the cerebellum are unique in comparison with those elsewhere in the brain?
What will be an ideal response?
The spleen
A. filters damaged red blood cells from the blood. B. changes undifferentiated lymphocytes into competent lymphocytes. C. is necessary for life. It can't be removed without causing death. D. produces several different hormones with unknown function. E. has additional digestive functions.
Which of the following provides vascular tone?
a. acetylcholine. b. dopamine. c. GABA. d. glycine. e. norepinephrine.
In a relaxed muscle fiber, what blocks the active sites on actin?
A. Tropomyosin B. Myosin heads C. Troponin D. Elastic fibers E. Calcium ions