EVERYDAY SCIENCE

SCIENCE

NERVOUS SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The presynaptic neuron releases neurotransmitters
A
True
B
False
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -At a chemical synapse, an action potential triggers the presynaptic neuron to release neurotransmitters. These molecules bind to receptors on the postsynaptic cell and make it more or less likely to fire an action potential.

Detailed explanation-2: -Neurotransmitters are released from synaptic vesicles in presynaptic neurons in response to neural activity, diffuse across the synaptic cleft, and bind specific receptors in order to bring about changes in postsynaptic neurons.

Detailed explanation-3: -The neurotransmitter acetylcholine (AChE) is formed in the pre-synaptic neuron and released into the synaptic cleft where it reversibly binds with (Geldmacher and Whitehouse, 1997) different classes of acetylcholine receptors. These receptors are nicotinic and muscarinic receptors.

Detailed explanation-4: -Neurotransmitter molecules are released from presynaptic terminals along the axon of nerve Cell A, travel through the synaptic cleft and reach the postsynaptic terminal on Cell B’s dendrite.

Detailed explanation-5: -A presynaptic neuron transmits the signal toward a synapse, whereas a postsynaptic neuron transmits the signal away from the synapse. The transmission of information from one neuron to another takes place at the synapse, a junction where the terminal part of the axon contacts another neuron.

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