What are two basic functional distinctions between ionotropic ...

[dejastew]

What are two basic functional distinctions between ionotropic receptors and metabotropic receptors?
 
  What will be an ideal response?

Question 2

What are two basic ways of distinguishing a neurotransmitter (its most specific meaning) and a neurohormone (its most specific meaning)?
 
  What will be an ideal response?

[todom5090]

Answer to Question 1

Ionotropic (fast) receptors are directly linked to ion channels. Thus, receptor activation induces very rapid onset of actions on neurons, and, typically, a short-duration action. Metabotropic (slow) receptors work via their activation of secondary messenger systems within neurons, thus acting on ion channels indirectly. Metabotropic receptor activation induces effects relatively slowly and for a longer period of time than is generally the case with ionotropic receptors.

Answer to Question 2

Neurotransmitters are generally released in the close proximity to their receptors and induce relatively short duration actions on target neurons. Neurohormones are generally released from cells relatively far away from their target receptors and are more likely to induce relatively long-lasting actions on the target neurons