Since the tension produced by a contracting muscle fiber depends upon the number of crossbridges between the thick and thin filaments, stretching the muscle beyond 28 mm:
What will be an ideal response?
decreases the amount of overlap and decreases the amount of tension produced by a single contraction.
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According to the sliding filament model, in order for a sarcomere to contract:
a. bridges must form between the actin and myosin b. calcium must be released from the endoplasmic reticulum c. ATP must be broken down for energy d. all of the above
When the carbonic acid-sodium bicarbonate buffer pair buffers lactic acid:
a. the amount of carbonic acid in the blood decreases b. the amount of carbonic acid in the blood increases c. the amount of bicarbonate in the blood increases d. both A and C above
What type(s) of muscle tissue make(s) up the muscles of inspiration and expiration?
A. Inspiratory muscles consist of skeletal muscle, and expiratory muscles consist of smooth muscle. B. Inspiratory muscles consist of skeletal muscle, and expiratory muscles consist of cardiac muscle. C. Both consist of skeletal muscle. D. Both consist of smooth muscle. E. Inspiratory muscles consist of smooth muscle, and expiratory muscles consist of skeletal muscle.
In adults, the function of the yellow marrow is to ________
A) store adipose tissue B) form blood cells C) store calcium and phosphorus D) promote lengthwise growth in long bones E) decrease friction at joint surfaces