3 part question. Thanks in advance. -72 mV and A neurotransmitter opens chl orid

Question

3 part question. Thanks in advance.

-72 mV and A neurotransmitter opens chl oride (Cl-) channels on a postsynaptic neuron. Vm -85 mV in the postsynaptic neuron. Answer questions 17-19 about this neuron. 17. The Cl-channels opened by the neurotransmitter on the postsynaptic neuron are a. leak channels b. aquaporins c. voltage gated channels d. ligand (chemically) gated channels 18. When the channels open, chloride: a. moves into the neuron b. moves out of the neuron c. there is no net movement of Cl- ions into or out of the neuron 19. The neurotransmitter is: a. inhibitory b. excitatory c. possibly glutamate d. possibly glycine e. b and c f. a and d

Explanation / Answer

17) The chlorine channels opened by neurotransmitters on postsynaptic neuron are

d. Ligand (chemically ) gated channels

Because chloride channel opens in response to ligand (chemical )binding to the channel, so it is ligand gated channel

18) When the channels open chloride

a. moves into the neuron

Chloride ion present in synapse moves into postsynaptic neuron to make it more negatively charged and thus hyper polarisation occurs to inhibit the generation of action potential in post synaptic neurone.

19) The neurotransmitter

a. inhibitory

Because both glutamate and glycine have same function

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