Which of the following hormones is not involved in the male reproductive system?
A) FSH
B) LH
C) testosterone
D) progesterone
D
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Rickettsias enter host cells by inducing ________.
Fill in the blank(s) with the appropriate word(s).
What are the two main steps that must happen to a protein in order for it to be catabolized and broken
down by the citric acid cycle?
a. The protein must be phophorylated and broken into amino acids. b. The protein must be glycosylated and transported to the liver. c. The protein must be hydrolyzed and the amino group removed. d. The amino group must be removed followed by the carboxyl group. e. The protein is broken into monomers and converted to acetate.
Place the following events in the order in which they occur for chemical synapse transmission
(1) Ca2+ enters axon terminal. (2) Ligand-gated ion channels open in postsynaptic membrane. (3) Neurotransmitter binds to postsynaptic receptor. (4) Action potential reaches axon terminal of presynaptic neuron. (5) Neurotransmitter released by exocytosis.
a. 4, 1, 5, 3, 2 b. 4, 3, 1, 5, 2 c. 4, 5, 1, 3, 2 d. 4, 1, 3, 5, 2 e. 4, 5, 2, 3, 1
Among subatomic particles, each _______ has a charge of +1 each _________ has a charge of -1, and each ________ has no charge
Fill in the blank(s) with correct word