ter 12-Nervous Tissue (15 pts) Question 6 (of 15) Fill in the blanks with the te

Question

ter 12-Nervous Tissue (15 pts) Question 6 (of 15) Fill in the blanks with the terms provided. Not all terms will be used. synaptic knob into IF synaptic cleft synaptic vesicles IF into the synaptic knob chemically gated calcium voltage-gated calcium synaptic knob close When the propagated action potential reaches the synaptic cleft at the end of the axon, voltage-gated calcium channels are triggered to . Calcium ions move from the synaptic vesicles down their concentration gradient. The entry of calcium triggers a series of events, resulting in fusion of chemically gated calcium with the neuron plasma membrane. Neurotransmitter is subsequently released into the synaptic knob by exocytosis Approximately 300 vesicles are released per action potential. open

Explanation / Answer

When the propagated action potential reaches the SYNAPTIC CLEFT at end of axon,VOLTAGE GATED CALCIUM channels are triggered to OPEN.Calcium ions move from the SYNAPTIC VESCICLES down their concentration gradient.The entry of calcium triggers a series of events,resulting in fusion of CHEMICALLY GATED CALCIUM with neuron plasma membrane.Neurotransmitter is subsequently released into SYNAPTIC KNOB by exocytosis.Approcimately 300 vescicles are released per action potential.

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