PHYSIOLOGY
SYNAPTIC PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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K+ ions are pumped out of the cell to depolarize the membrane.
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Ion channels let K+ diffuse into the cell to depolarize the membrane.
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Na+ ions are pumped into the cell to repolarize the membrane.
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Ion channels let Na+ diffuse into the cell to depolarize the membrane.
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Detailed explanation-1: -Within a neuron, the impulse moves to the tip of an axon and causes the release of neurotransmitters, chemicals that act as messengers. Neurotransmitters pass through the synapse, the gap between two nerve cells, and attach to receptors on the receiving cell.
Detailed explanation-2: -The local depolarization of the muscle cell plasma membrane opens voltage-gated Na+ channels in this membrane, allowing more Na+ to enter, which further depolarizes the membrane.
Detailed explanation-3: -The answer is: A chemical process that takes place at the synapse.
Detailed explanation-4: -Ion Channels Allow Ion Movement Embedded throughout the neuronal membrane are ion channels. Ion channels are proteins that span the width of the cell membrane and allow charged ions to move across the membrane.