The epithelium of the vomeronasal organ is similar to the olfactory epithelium in which way?
A) Both express the same chemoreceptors.
B) Physical location
C) Both activate the same signal transduction pathway.
D) None of the above
Answer: D
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Regulation of extracellular K+ is not critical to body function because only about 2% of the total-body K+ is in the extracellular fluid.
Answer the following statement true (T) or false (F)
How does the avascular cornea acquire oxygen?
A. Oxygen diffuses from the atmosphere to the cornea. B. Lysozyme in tears releases oxygen to nourish the cornea. C. The ciliary body provides oxygen to the cornea. D. Oxygen diffuses from the capillaries in the iris to the cornea.
Characteristics of the mature sperm include the ________.
A) presence of two X chromosomes in approximately half the sperm B) presence of Y chromosomes in approximately half the sperm C) absence of an acrosome D) absence of coiled mitochondria
Lymphocytes that destroy foreign cells or virus-infected cells are ________ cells
A) B B) plasma C) helper T D) cytotoxic T E) suppressor T