Multiple sclerosis is
A. a type IV hypersensitivity disease involving attack on the myelin sheath of neurons.
B. a genetic birth defect of the nervous system.
C. a type II hypersensitivity to the myelin of neurons.
D. the formation of antibodies against transplanted tissue.
E. a neurological disease due to the accumulation of immune complexes in nerves.
Answer: A
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In a ribbon model of a polypeptide, broad arrows indicate:
A. -sheets. B. -helices. C. disulfide linkages. D. -sheets and -helices. E. All of these choices are correct.
Which region(s) of the brain, present in a 5-week old embryo, is/are derived from the midbrain?
a. telencephalon only b. diencephalon only c. mesencephalon only d. telencephalon and diencephalon e. telencephalon and mesencephalon
An organism that develops different phenotypes in different environments is said to exhibit what trait?
What will be an ideal response?
Nitric oxide gas is a ________ because it initiates a chain of biochemical reactions within a target cell in response to the binding of a hormone to a plasma membrane receptor
Fill in the blank(s) with correct word