The proton pump involves the movement of
A. ADP.
B. hydrogen ions.
C. ATP.
D. All of these answers are true.
B. hydrogen ions.
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In cells that virtually never divide, in which phase are they apparently locked?
a. G1 b. G2 c. Mitosis d. Cytokinesis e. All cells divide on a regular basis.
Which of the following secretes a hormone that
causes its own secretory cells to respond? a. small intestine b. pancreas c. large intestine d. stomach e. liver
Insufficient production of acetylcholine in the synapses of the brain, abnormal tangled neurons, and large deposits of beta-amyloid are problems associated with which one of the following diseases?
A) meningitis B) Alzheimer's disease C) rabies D) Parkinson's disease E) epilepsy
The normal microbiota is part of the _______ line of defense.
A. first B. second C. third D. fourth