Compare the following analogy to chemical synaptic transmission: Two postage companies use different methods for delivery. Company One's method is to send a delivery person out with packages that will be delivered directly to the address on the label. Company Two's method is to send a delivery person out to a transfer center, and a second driver will deliver the package to the address. Company One's method best compares to ___________________, while Company Two's method best compares to ___________________. Company ___ uses a faster method.
A)G protein-coupled receptors (GPCRs); ligand-gated ion channels; One
B)G protein-coupled receptors (GPCRs); ligand-gated ion channels; Two
C)ligand-gated ion channels; G protein-coupled receptors (GPCRs); One
D)ligand-gated ion channels; G protein-coupled receptors (GPCRs); Two

Question

Quizplus · Accepted Answer

Ligand-gated ion channels directly open in response to neurotransmitter binding, similar to direct delivery. GPCRs involve a secondary messenger system, akin to a transfer center. Company One's method is faster, like ligand-gated ion channels.

Compare the Following Analogy to Chemical Synaptic Transmission: Two Postage