Proteins in cells can act as important buffer systems. If intracellular pH rises, certain ________ of proteins can ________ H+ to return pH to normal conditions.
A. amino acids; accept
B. nucleotides; donate
C. nucleotides; accept
D. amino acids; donate
Answer: D
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Water output is largely controlled by varying ________
A) drinking B) cutaneous transpiration C) sweating D) metabolic water production E) urine volume
Which is not a correct pairing of a joint with its common name?
A. Radiocarpal joint - wrist B. Glenohumeral joint - elbow C. Metacarpophalangeal - knuckle D. Temporomandibular - TMJ E. Talocrural - ankle
Entry of ___ ions into the synaptic knob triggers exocytosis of neurotransmitters.
Fill in the blank(s) with the appropriate word(s).
Why does botox diminish frown lines?
A. It blocks the release of calcium from the sarcoplasmic reticulum. B. It blocks the release of acetylcholine from motor neurons. C. It blocks sodium channels in motor neurons. D. It blocks the binding site for myosin heads. E. It blocks acetylcholine receptors.