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  • The chemicals which regulate synaptic transmission at chemical synapses are calledOption: 1 Neurohormones<div class

The chemicals which regulate synaptic transmission at chemical synapses are called

Option: 1

Neurohormones


Option: 2

Neurotransmitters


Option: 3

Iodothyronins


Option: 4

Second messengers


Answers (1)

best_answer
 

As we have learnt:

Transmission of Impulses: At Chemical Synapse

  • Transmission across a chemical synapse is carried out by neurotransmitters, which are stored in synaptic vesicles in the axon terminals.
  • When nerve impulses travelling along an axon reach an axon terminal, channels for calcium ions (Ca2+) open, and calcium enters the terminal.
  • This sudden rise in Ca2+ stimulates synaptic vesicles to merge with the presynaptic membrane, and neurotransmitter molecules are released into the synaptic cleft. 
  • They diffuse across the cleft to the postsynaptic membrane, where they bind with specific receptor proteins. 
  • Depending on the type of neurotransmitter and the type of receptor, the response of the postsynaptic neuron can be toward excitation or toward inhibition. 

Therefore, transmission across a chemical synapse is carried out by neurotransmitters, which are stored in synaptic vesicles in the axon terminal. Hence, the correct answer is option b.

Posted by

Pankaj

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