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Question

Which is the correct match?
  1. Dendrite - Accepts signal / stimulus
  2. Dendrite - Sends signal / stimulus
  3. Axon - Smallest part of neuron
  4. Synaptic knob - Present at the end of dendron

A
Dendrite - Accepts signal / stimulus
B
Dendrite - Sends signal / stimulus
C
Axon - Smallest part of neuron
D
Synaptic knob - Present at the end of dendron
Solution
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  • The dendrites accept signals generated by other neurons. These signals may be excitatory or inhibitory. All signals present at the dendrites of a neuron are combined and the result will determine whether or not that neuron will fire. If a neuron fires, an electrical impulse is generated.
  • An axon, or nerve fibre, is a long slender projection of a nerve cell or neuron, that conducts electrical impulses away from the neuron's cell body or soma.
  • Axon terminals have knob-like swellings at the very end called synaptic knobs. The function of a synaptic knob is to change the action potential that is carried by axons into a chemical message.
Therefore, the correct answer is option A.

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