________ is fat soluble, produced in the skin on exposure to UV radiation, and necessary for normal bone growth and function
A) Cortisol
B) Vitamin K
C) Vitamin A
D) Vitamin D
D
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Erection is caused by muscle contraction in the penis
Indicate whether the statement is true or false.
Cold temperatures (below 36°C) denature proteins, which is why biochemistry labs never freeze enzymes.
Answer the following statement true (T) or false (F)
When normal buffer mechanisms are overwhelmed by excessive numbers of hydrogen ions, which of the following will result?
A. acidosis B. alkalosis C. neither of these
Answer the following statements true (T) or false (F)
1. Damage to a receptor on the cell membrane would make it more difficult for a cell to respond to a steroid hormone. 2. The “lock and key” model applies only to the functioning of nonsteroid hormones. 3. Researchers believe that prostaglandins influence the production of ATP in the cell. 4. The neurohypophysis produces about twice as many hormones as the adenohypophysis. 5. The hypothalamus produces substances that function as tropic hormones.