The diagram illustrates glands of the skin. What does "C" represent?
A.
duct of eccrine sweat gland
B. sebaceous gland
C. sweat pore
D. apocrine sweat gland
E.
hair follicle
F. eccrine sweat gland
E
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Which is not a reason gas exchange is efficient at the blood air barrier?
A) Partial pressure differences are substantial. B) Distance is short. C) Surface area is large. D) Gap junctions facilitate fast movement. E) Gases are lipid soluble.
Radioactive materials and X-rays can cause ____________________ in DNA by disrupting exact copying of the nucleotide sequence
Fill in the blank(s) with correct word
Which one of the following alimentary segments has NO digestive function?
A) cardial region of the stomach B) pyloric region of the stomach C) mouth D) esophagus E) duodenum
Vitamin A plays a critical role in night vision because:
A. it is required for the synthesis of the retinal portion of rhodopsin. B. it is transformed into the opsins found in cone cells. C. it acts a coenzyme in the reaction that degrades cGMP within rod cells. D. it catalyzes the mitotic generation of light-reflecting epithelial cells, which support widely dispersed rod receptors. E. it is a key intermediate in the signal transduction pathway within cone cells that is activated by light.