Question

you are studying the effects of three new neuropeptide drugs in culture. you find that drug a causes a short term increase in a k current. drug b causes a short-term increase in a cl- current. adding drugs a and b together results in a long-term increase in the number of ca channels in addition to the effect that each drug has on its own. adding drug c results only in a short-term increase in the na current. assume that each drug affects a different receptor and that no receptor directly binds more than one drug.

Answer 1

Neuropeptide drugs A and B affect ion channels in neurons, leading to changes in cellular responses. Drug A increases K+ current, while drug B increases Cl- current. Adding both drugs together results in a long-term increase in the number of Ca2+ channels. Drug C only causes a short-term increase in Na+ current.

Step-by-step explanation:

Neuropeptide drugs are known to affect ion channels in neurons, leading to changes in cellular responses. In this case, drug A causes a short-term increase in a K+ current, while drug B causes a short-term increase in a Cl- current. Adding drugs A and B together results in a long-term increase in the number of Ca2+ channels. On the other hand, drug C only causes a short-term increase in a Na+ current.

The effects of these drugs can be explained by their interactions with specific receptors on the postsynaptic membrane. When a neurotransmitter binds to its receptor, it opens specific ion channels. In this case, drug A likely binds to a receptor that opens K+ channels, increasing K+ current. Drug B likely binds to a receptor that opens Cl- channels, increasing Cl- current.

The combined effects of drugs A and B suggest that they activate receptors that lead to an increase in the number of Ca2+ channels in the long term. Finally, drug C likely binds to a receptor that opens Na+ channels, increasing Na+ current.