A hormone called ________ is produced by the thyroid gland and stimulates osteoblast activity.
Fill in the blank(s) with the appropriate word(s).
calcitonin
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Considering the distribution of sympathetic and parasympathetic fibers in the peripheral nervous system, damage to which of the following nerves would have the greatest impact on blood vessel walls?
A. Both "Pelvic nerves" and "Cranial nerves" are correct. B. Thoracic nerves C. Pelvic nerves D. Cranial nerves
Which is TRUE about the resting membrane potential?
A. It requires very few ions to be distributed unevenly. B. It has the same value in all cells. C. It is oriented so that the cell's interior is positive with respect to the extracellular fluid. D. Only nerve and muscle cells have a potential difference across the membrane at rest. E. It is not altered by changing concentration gradients of permeating ions.
Two atoms that have the same chemical characteristics but different atomic masses are considered ________.
Fill in the blank(s) with the appropriate word(s).
If a DNA molecule were known to be 22% thymine (T), what would be the percentage of guanine (G) present?
A. 11% B. 22% C. 78% D. 28% E. 8%