Which Brodmann area is responsible for vision reception?
What will be an ideal response?
(17)
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Mucus functions in
A) protection and lubrication. B) protection, lubrication, and enzyme activation. C) protection only. D) lubrication only. E) enzyme activation only.
Unlike steroid hormones, thyroid hormones (T3 and T4) can be stored after synthesis. This is due to the fact that
a. thyroid hormones are not membrane-permeant molecules. b. thyroid hormones are protein hormones, and are stored in vesicles until an elevation in intracellular calcium stimulates their release. c. thyroid hormones are sequestered in colloid, surrounded by a wall of follicular cells, and that presents too much of a barrier for the hormones to pass through. d. thyroid hormones remain attached to a larger protein molecule until the thyroid is stimulated to secrete them, at which point they are cleaved from the protein and diffuse from the cell into the circulation. e. None of the above is correct.
The plasma membrane is referred to as a mosaic because of the presence of ________.
stationary proteins in a uniform arrangement carbohydrates in changing patterns phospholipids that are in constant motion moving proteins in a random arrangement
During ventricular systole, the
A) atria are contracting. B) blood is entering the ventricles. C) AV valves are closed. D) pressure in the ventricles remains constant. E) pressure in the aorta remains constant.