The correct answer is: Binding of the neurotransmitter causes chemically gated sodium channels to open in the motor end plate (junctional folds of the sarcolemma) and sodium enters the cell.
Action potential travels through the membrane of the presynaptic cell causing the voltage-gated 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. Neurotransmitter ACh binds to its receptors on the postsynaptic membrane and its binding causes depolarization of the target cell (muscle cell). Depolarization occurs because sodium enters the cell as a result of neurotransmitter receptor binding.
The answer to this question would be...
B. Thousands
If you go to webpage <span>http://www.shapeoflife.org/2d-animal-cells-have-many-thousands-genes it will give you the same answer if you read through it.
Hope this helps a lot, leave a rating and like if it did!</span>
The answer would be : <span>It is a well supported explanation which cannot become a law.
A law and a theory are different you know. In fact, the law is universel. This applies for everything unlike a theory which explains in particular why something is happening.
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Photon</span>
The correct answer is option B. Wind-pollinated plants rely on large quantities of pollen grains.
The plants, which pollinate by wind spend less energy in creating attractive structures to attract pollinators, instead they produce many pollen grains, which are light and easy to carry by winds. the pollens are usually dry.
The angiosperm mostly rely on animal pollinator and they have large colorful flowers, which produce nectar to attract the insects or other animals.
