A sign of aging of the muscular system is
A. excess ATP.
B. decreased supplies of myoglobin.
C. expansion of muscle fiber diameters.
D. increased creatine phosphate.
Answer: B
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Which organ system includes the spleen and the tonsils?
A) digestive B) endocrine C) nervous D) cardiovascular E) lymphatic
The condition known as "tennis elbow" is caused by trauma or overuse of the
A. common flexor tendon of the anterior forearm muscles. B. common flexor tendon of the posterior forearm muscles. C. common extensor tendon of the anterior forearm muscles. D. common extensor tendon of the posterior forearm muscles. E. None of the choices is correct.
Which is NOT true about protein kinases?
A. They perform the opposite function as phosphatases. B. They add phosphate groups to proteins. C. They remove phosphate groups from proteins. D. They produce effects similar to allosteric modulation. E. They use ATP to carry out their reactions.
X-linked genes are expressed __________.
A) more often in females. B) at equal rates in the two genders. C) more often in males.