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Question
Biology
Posted 10 months ago
Label the steps involved with the transmission of a signal across a synapse
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Answer from Sia
Posted 10 months ago
Answer
The steps involved in the transmission of a signal across a synapse are complex and involve multiple stages.
Solution
a
Arrival of action potential: The action potential arrives at the presynaptic terminal
b
Calcium ion influx: Voltage-gated calcium channels open, allowing Ca²⁺ ions to enter the presynaptic neuron
c
Neurotransmitter release: The influx of Ca²⁺ triggers the fusion of synaptic vesicles with the presynaptic membrane, releasing neurotransmitters into the synaptic cleft
d
Neurotransmitter binding: The neurotransmitters diffuse across the synaptic cleft and bind to receptors on the postsynaptic neuron
e
Postsynaptic response: Binding of neurotransmitters to receptors induces a response in the postsynaptic neuron, which may be excitatory or inhibitory
f
Termination of signal: The neurotransmitter's action is terminated by reuptake into the presynaptic neuron, enzymatic degradation, or diffusion away from the synapse
Key Concept
Synaptic transmission is the process by which neurons communicate with each other through the release and reception of neurotransmitters.
Explanation
This process is essential for the propagation of electrical signals in the nervous system, allowing for complex functions such as thought, movement, and sensation.

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