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Types of Synapse

Chemical tran...

Question

Chemical transmission of nerve impulses from one neuron to another is by

A

Adrenaline

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B

Acetylcholine

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C

Dopamine

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D

All of the above

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Solution

The correct option is D All of the above
Neurotransmitters are the brain chemicals that relay signals between neurons. There are two kinds of neurotransmitters viz., inhibitory and excitatory. Excitatory neurotransmitters stimulate the brain. Those that calm the brain and help create balance are called inhibitory. Examples of excitatory neurotransmitters are dopamine, epinephrine and norepinephrine. Examples of inhibitory neurotransmitters are serotonin and GABA. Thus, the correct answer is option D.

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Q. Question 21
Which of the following statements about transmission of nerve impulse is incorrect?

(a) Nerve impulse travels from dendritic end towards axonal end.
(b) At the dendritic end electrical impulses bring about the release of some chemicals which generate an electrical impulse at the axonal end of another neuron.
(c) The chemicals released from the axonal end of one neuron cross the synapse and generate a similar electrical impulse in a dendrite of another neuron.
(d) A neuron transmits electrical impulses not only to another neuron but also to muscle and gland cells.

Q. Assertion: Transmission of the nerve impulse across a synapse is accomplished by neurotransmitters.
Reason: Transmission across a synapse usually requires neurotransmitters because there is small space i.e. synaptic cleft, that separates one neuron from another.

Unidirectional transmission of a nerve impulse through neuron is due to the fact that

Q. The chemical causing the transmission of nerve impulse across synapse is

Q. A nerve impulse is transmitted from one neuron to another through junctions called synapses. Which one is not part of synapse?

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