The lens is bathed on both sides by
a. the vitreous humor.
b. the aqueous humor.
c. blood.
d. a solution rich in glucose.
e. the enzymes for proper function.
B
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Four of the five answers represent events that occurred when free oxygen (O2) became available in the atmosphere. Select the exception
a. aerobic respiration emerged. b. some organisms changed their metabolism. c. some species that could not detoxify free radicals became restricted to the low-oxygen environments that remained. d. oxygen was toxic to many species and some cells and forms of life became extinct. e. photosynthesis was no longer a common form of energy production.
Activities like playing a musical instrument regularly can affect the size of brain regions involved in performing these activities.
Answer the following statement true (T) or false (F)
Transfusion reactions are the result of antibody reaction to
A) glycolipids and glycoproteins on the surface of red blood cells. B) MHC molecules on red blood cells. C) MHC molecules on white blood cells. D) plasma proteins. E) foreign antibodies.
In the human endocrine system, the hormone prolactin is produced by the _____________________ and targets the _______________.
A. anterior pituitary; mammary glands B. anterior pituitary; pancreas C. posterior pituitary; kidneys D. posterior pituitary; mammary glands E. posterior pituitary; pancreas