Cell Physiology Questions

Cell Physiology Questions - Cell Physiology Questions 1....

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Cell Physiology Questions 1. The plasma membrane of a neuronal axon is depolarized to threshold. Which of the following is not a direct effect of this depolarization? A. closing the inactivation gates of voltage-gated Na + channels B. release of neurotransmitter from the axon terminal C. initiation of an action potential D. opening the activation gates of voltage-gated Na + channels E. opening the activation gates of delayed rectifier K + channels 2. In which of the following is a transport protein most correctly matched with its function? A. voltage-gated Na + channel -- rapid depolarization phase of the action potential B. CFTR -- maintaining low [Ca ++ ] in cytoplasm C. delayed rectifier K + channel -- primarily responsible for the resting membrane potential D. Na + /glucose co-transporter -- keeping [Na + ] low in the cytoplasm E. Na + /K + ATPase -- repolarization phase of action potential 3. Which of the following is true? A. The nicotinic acetylcholine receptor is a G-protein linked receptor. B. ATP is hydrolyzed to cyclic AMP by phosphodiesterase. C. The muscarinic acetylcholine receptor is a ligand-gated channel. D. DAG and IP 3 are produced by the cleavage of a membrane phospholipid. E. Cyclic AMP is the second messenger that leads to neurotransmitter release. 4. The muscle end-plate potential is: A. an example of an excitatory post-synaptic potential B. due to ion flow through a voltage-dependent channel C. equal to the Nernst potential for Na
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This note was uploaded on 12/03/2009 for the course PSL 431 taught by Professor Stephenson during the Spring '07 term at Michigan State University.

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Cell Physiology Questions - Cell Physiology Questions 1....

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