Complete the sentences by choosing the correct term from each dropdown menu.A muscle cell is stimulated by a that is released from a motor neuron.Ion channels open in the plasma membrane and diffuse into the .The membrane , or becomes less negative.Sodium ion channels close, but channels remain open and loss of that ion the membrane.The process just described is called .

Movement of sodium ions into the muscle cell at the neuromuscular junction causes _____________.Multiple Choicedepolarization of the muscle cell membranereuptake of acetylcholinerelease of acetylcholinerepolarization of the muscle cell membrane

Which substance is stored in the muscle’s endoplasmic reticulum and then released when a nerve signal stimulates a muscle fiber?Group of answer choicesMyoglobinCalcium ionsATPSarcomeres

Skeletal muscles can be stimulated to contract by a motor neuron very quickly. What makes that possible.Multiple choice question.Muscle cells have a resting membrane potential that is higher than the threshold potential.Muscle cells do not need ACh receptors, their membranes are directly and quickly depolarized by ACh.The nicotinic receptors for ACh on muscle cells become sodium channels and cause rapid depolarization of the membrane.

After stimulation, positive ions enter the cell. This causes the membrane to Blank______.Multiple choice question.depolarizehyperpolarizebecome less permeablerepolarize

Movement of Na+ ions into a nerve cell during the upstroke of an action potential is an example of of the following transport mechanismSelect one:a. Facilitated diffusionb. Co-transportc. Primary active transportd. Simple diffusion