Answer:
they are Na+, K+ and Ca2+ ion channels.
Explanation:
Ionotropic acetylcholine receptors are also called nicotinic acetylcholine receptors because beside acetylcholine (Ch) they respond to nicotine. These receptors are primary receptors in muscle for motor nerve-muscle communication that controls muscle contraction.
Two molecules of ACh are required for receptor to open. Since the receptors are linked to ion channels, the channels open. Opening of the channel allows positively charged ions to move across it: sodium enters the cell and potassium exits.
Hydra have the ability not age or die of old page
Answer:
C. Large supermarket chains can negotiate prices because they have such a strong presence in the agricultural community. Im sorry no one answers these
B the higher the number the colder it is because it is away from the eqator
The change of temperature lava cools down/seconds it flows down.
