A blind spot in the retina occurs where
A) the optic nerve leaves the eye.
B) the fovea is located.
C) ganglion cells synapse with bipolar cells.
D) amacrine cells are located.
E) rod cells are clustered to form the macula.
A) the optic nerve leaves the eye.
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Developmentally, when is myelination complete?
A. It is completed during week 14, after fertilization. B. It is complete by the 7th month of development. C. It is complete just before birth. D. It is complete by the first year after birth. E. It is not complete until late adolescence.
When a catecholamine or peptide hormone binds to receptors on the surface of a cell,
A) a second messenger appears in the cytoplasm. B) the cell becomes inactive. C) the hormone is transported to the nucleus where it alters the activity of DNA. D) the cell membrane becomes less permeable. E) None of the answers are correct.
When comparing the dermis with the subcutaneous tissue, the dermis
A. contains melanocytes; the subcutaneous layer does not. B. and the subcutaneous layer do not contain collagen. C. has more adipocytes than the subcutaneous layer. D. is divided into two layers; the subcutaneous layer is not. E. is a more vascular tissue than the subcutaneous layer.
The thoroughfare channel ends at the
A) artery. B) arteriole. C) capillary. D) venule. E) vein.