Structure G is composed of
A) actin.
B) myosin.
C) troponin.
D) tropomyosin.
E) sarcoplasmic reticulum.
B) myosin.
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Tissue perfusion is largely controlled by ______ to ensure that blood flow meets the cells' needs.
What will be an ideal response?
Which type of bone cell incorporates calcium and phosphate ions into bone tissue?
A. Osteoblast B. Osteoclast C. Osteochondral progenitor cell D. Osteocyte
Oxygen is unloaded from the blood stream and diffuses into surrounding cells and tissues during ________
A) internal respiration B) pulmonary ventilation C) external respiration D) respiratory gas transport E) tidal volume
What is the function of the auditory (Eustachian) tube?
A. Allows us to hear ourselves speak B. Allows fluid to drain out of the inner ear C. Equalizes air pressure in the middle ear D. Allows passage of the auditory nerve