A person who has full-blown AIDS often dies as a result of ________
A) Organ failure and subsequent transplant
B) Infectious diseases
C) Over-proliferation of T-cells
D) The HIV virus
B
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Which of the following statements about voltage-gated sodium channels is true?
a. All cells contain voltage-gated sodium channels. b. Voltage-gated sodium channels are integral membrane proteins. c. Voltage-gated sodium channels have roughly equal permeability to Na+ and K+. d. Voltage-gated sodium channels open in response to any change in membrane potential. e. Voltage-gated sodium channels open in response to binding of acetylcholine.
_____________ is the process of converting energy in the form of light, sound, movement, or touch into a neural signal.
Fill in the blank(s) with the appropriate word(s).Fill in the blank(s) with the appropriate word(s).
Exposure to ultraviolet light darkens skin by stimulating synthesis of
A. hemoglobin. B. cyanin. C. carotene. D. melanin.
There are normally a total of ________ primary teeth
A) 18 B) 20 C) 22 D) 26 E) 32