An electromyogram is a visual representation of ________
A) action potentials generated along sarcolemmas
B) transmission of acetylcholine
C) activity of a single motor unit
D) movement of charged ions out of the muscle cell
Answer: A
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Which type of membrane lines cavities that open to the outside and often contains mucous glands?
A. Serous B. Gobletal C. Cutaneous D. Synovial E. Mucous
During cellular respiration, decarboxylation occurs when
A. a carbon atom is removed from glucose. B. a carbon dioxide molecule is removed from the cytosol. C. a carboxyl group is released from pyruvate. D. a carbon atom is removed from and an oxygen atom is added to fructose. E. all carbon and oxygen atoms are released from a high-energy molecule.
A neutral atom will become a cation if it
A. loses protons. B. gains protons. C. gains neutrons. D. loses electrons. E. gains electrons.
When potassium channels open and the ions diffuse through the membrane,
A) the inside of the membrane will become more positive. B) the inside of the membrane will become more negative. C) there will be almost no effect on transmembrane potential. D) the membrane will become depolarized. E) the membrane will depolarize to threshold.