Arrange the sequence of events at the nmj from first to last. rank the sequence of events at the nmj that initiate an action potential in the muscle fiber, from first to last. view available hint(s) action potential arrives at the axon terminal. action potential arrives at the axon terminal. acetylcholine binds to its receptors on the junctional folds. acetylcholine binds to its receptors on the junctional folds. calcium ions enter the axon terminal. calcium ions enter the axon terminal. synaptic vesicles fuse to membrane of axon terminal. synaptic vesicles fuse to membrane of axon terminal. junctional folds become depolarized. junctional folds become depolarized. action potential is initiated on the sarcolemma. action potential is initiated on the sarcolemma. acetylcholine is released into the synaptic cleft. acetylcholine is released into the synaptic cleft.

Action potential arrives at the axon terminal.  

Calcium ions enter the axon terminal  

Synaptic vesicles fuse to membrane of axon terminal. Acetylcholine is released into the synaptic cleft.

Acetylcholine binds to its receptors on the junctional folds.

Junctional folds become depolarized.

Action potential is initiated on the sarcolemma.  

Explanation:

When the electrical signal (action potential) reaches the axon terminal it opens Ca channels that release Ca ions from the outside inside the axon terminal. Ca ions trigger the fusion of vesicle with membrane of the presynaptic cell (axon terminal). As a consequence, neurotransmitter-acetylcholine is released into the synaptic cleft. It diffuses to the postsynaptic cell and binds to its receptor (nicotinic acetylcholine receptor). The binding of acetylcholine leads to the depolarization of  the sarcolemma.

ysosomes are membrane-bound vesicles that contain digestive enzymes, such as glycosidases, proteases and sulfatases. lysosomal enzymes are synthesized in the endoplasmic reticulum (er), are transported to the golgi apparatus, and are tagged for lysosomes by the addition of mannose-6-phosphate label.

explanation:

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.