Calcium enters the cell through ion channels, moving from areas of high to low concentration. This transport mechanism is described as:A.passive diffusion.B.facilitated diffusion.C.primary active transport.D.secondary active transport.

The main factor which facilitates the movement of calcium through a cell membrane is _____.

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

.How do potassium ions primarily enter animal cells?a.Active transport by sodium-potassium pumpb.Passive diffusion through the lipid bilayerc.Facilitated diffusion through channel proteins

As a result of calcium ions diffusing into the presynaptic cell,Multiple Choiceacetylcholine is actively transported to the postsynaptic neuron.synaptic vessels migrate to the plasma membrane and release acetylcholine.sodium ions diffuse into the cell.acetylcholine is actively transported from the presynaptic neuron.ligand-gated sodium channels open.

Calcium ions are released from the sarcoplasmic reticulum into the cytosol