AT&T; 12:55 PM dcc.instructure.com Aquaporin Channels Question 45 0/2 pts Which

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AT&T; 12:55 PM dcc.instructure.com Aquaporin Channels Question 45 0/2 pts Which type of channels are located at the axon terminals and function in triggering the exocytosis of neurotransmitters? Voltage-gated Na+ channels Voltage-gated Cl- Channels Voltage-gated Ca2+ channels Ligand-gated K+ channels Question 46 0/2 pts The CNS neurotransmitter GABA: induces IPSPs by opening Cl- channels. induces EPSPs by opening Ca2+ channels. 0 always induces APs on the postsynaptic cell. is excitatory Question 47 2/2 pts

Explanation / Answer

45) Channels located at the axon terminals function to trigger the exocytosis of neurotransmitter. The classical neurotransmitter is stored in synaptic vesicles and the exocytosis of the transmitter associated is triggered by a localized rise cytosolic Ca2+ with the aid of voltage-gated Ca2+ channel.

46) The CNS neurotransmitter GABA is an inhibitory neurotransmitter and thus is involved in an inhibitory postsynaptic potential (IPSPs) which is a synaptic potential and lessen the likeliness of postsynaptic neuron to generate an action potential. Its action after binding to its receptor known to increase the frequency of opening of chloride ion channel and acts to hyperpolarize the membrane.

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