Question

question 3
an end plate potential is an event that involves a gain of
positive charge along the inside of the cell membrane, as potassium rapidly enters.
positive charge along the inside of the cell membrane, as sodium rapidly enters.
negative charge along the inside of the cell membrane, as potassium rapidly enters.
negative charge along the inside of the cell membrane, as sodium rapidly enters.
1 pts

Explanation:

An end - plate potential is a type of graded potential that occurs at the neuromuscular junction. When an action potential reaches the axon terminal of a motor neuron, it causes the release of acetylcholine. Acetylcholine binds to receptors on the muscle cell membrane (sarcolemma), which are ligand - gated ion channels. Sodium (\(Na^{+}\)) ions then rapidly enter the cell. Since sodium ions are positively charged, this influx of \(Na^{+}\) leads to a depolarization (gain of positive charge) along the inside of the cell membrane.

Answer:

positive charge along the inside of the cell membrane, as sodium rapidly enters.