Consider a hypothetical signaling pathway where the initiating signal is A, the terminal response is E, and there are three intermediate components, B, C, and D, such that the complete pathway is A-B-C-D-E. Experimentally, you determine that E acts to simulate A. This is an example of
A) negative feedback.
B) positive feedback.
C) feedforward relay.
D) stimulatory crosstalk.

Question

Quizplus · Accepted Answer

This is an example of positive feedback because E acts to stimulate A, creating a self-amplifying loop in the pathway.

Consider a Hypothetical Signaling Pathway Where the Initiating Signal Is