Asked by Rheagan Whitefield on May 11, 2024
Verified
When an action potential reaches the presynaptic terminal,
A) calcium ions diffuse into the presynaptic terminal through voltage-gated ion channels.
B) acetylcholine moves into the presynaptic terminal.
C) a local potential is generated in the presynaptic terminal.
D) ligand-gated ion channels in the presynaptic terminal are opened.
E) nothing else happens.
Presynaptic Terminal
The end of a neuron from which neurotransmitters are released to communicate with another neuron at a synapse.
Action Potential
An action potential is a rapid and temporary electrical charge that travels along the membrane of a neuron, enabling the transmission of signals.
Calcium Ions
Essential ions within the body that play key roles in blood clotting, muscle contraction, and nerve function.
- Detail the workings of synaptic transmission and how action potentials are propagated within muscle fibers.
Verified Answer
DF
Derek FowlerMay 11, 2024
Final Answer :
A
Explanation :
When an action potential reaches the presynaptic terminal, calcium ions diffuse into the terminal through voltage-gated ion channels. This influx of calcium ions triggers the release of neurotransmitters into the synaptic cleft.
Learning Objectives
- Detail the workings of synaptic transmission and how action potentials are propagated within muscle fibers.