A steroid hormone acts on a target cell by
A. causing a second messenger to be formed.
B. causing the cell to divide.
C. directly causing protein synthesis.
D. promoting phagocytosis.
Answer: C
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Chondroblasts ________
A) remain in compact bone even after the epiphyseal plate closes B) within the cartilage divide and secrete new matrix C) never lose their ability to divide D) are mature cartilage cells located in spaces called lacunae
The most primitive region of the cerebrum is probably the
A) reticular system. B) limbic system. C) pons. D) basal nuclei. E) corpus callosum.
Which lobe of the cerebrum is responsible for expressive language function?
What will be an ideal response?
What would be the best explanation for why myelinated fibers conduct signals faster than unmyelinated fibers?
A. There are no internodes in unmyelinated fibers. B. Facilitated diffusion of sodium and potassium is faster in myelinated fibers. C. There are more internodes in unmyelinated fibers. D. Diffusion of ions along the axoplasm is faster. E. Active transport of sodium and potassium is faster in myelinated fibers.