What happens as a result of ion flow at a presynaptic terminal?

synaptic vesicles migrate to the plasma membrane and release acetylcholine.
acetylcholine is passively transported from the presynaptic neuron.
acetylcholine is actively transported to the postsynaptic neuron.
ligand-gated sodium channels open.
sodium ions diffuse into the cell.

The correct answer is: Synaptic vesicles migrate to the plasma membrane and release acetylcholine.

Action potential travels through the membrane of the presynaptic cell causing the channels permeable to calcium ions to open. Ca2+ flow through the presynaptic membrane and increase the Ca concentration in the cell which will activate proteins attached to vesicles that contain a neurotransmitter (e.g. acetylcholine), Vesicles fuse with the membrane of the presynaptic cell, thereby release their contents into the synaptic cleft-space between the membranes of the pre- and postsynaptic cells.

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion

answer; i believe the correct answer is (sporophyte);