The C cells of the thyroid gland produce
A) only calcitonin.
B) only TSH.
C) only parathyroid hormone.
D) only thyroxine.
E) thryoxine and TSH.
A) only calcitonin.
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441) In the process of ________ a phosphate group is attached to a molecule.
Fill in the blank(s) with the appropriate word(s).
The opposite of extension is ________.
A. pronation B. inversion C. protraction D. flexion E. elevation
Which of the following is NOT true of glycolysis?
A) Two molecules of ATP are spent. B) Four molecules of ATP are synthesized. C) Glucose is split into two three-carbon pyruvate molecules. D) Four molecules of NADH are spent.
How do the lymphatic and immune systems contribute to osteoporosis?
A. Excessive smoking lowers estrogen levels, which increases bone loss. B. Immune cells resist infections and release chemicals that promote tissue repair. C. Calcium ions released from the bones are excreted. D. Lack of exposure to sunlight reduces vitamin D production and decreases calcium absorption. E. Decreased estrogen levels following menopause contribute to the disease.