Which statement about positive feedback regulation is accurate?

A. Positive feedback can generate responses that oscillate on and off as the activities or concentrations of the participating components rise and fall.
B. Positive feedback regulation can generate an abrupt, all-or-none response in which the cell moves from ignoring a signal to responding to it very strongly.
C. In positive feedback, a molecular switch enhances the response to a signal by activating a component that lies downstream in the pathway.
D. Positive feedback is rare in biological systems.
E. In positive feedback, a downstream component acts to inhibit an earlier component in the pathway to diminish the response to the initial signal.

Answer is B. Positive feedback regulation can generate an abrupt, all-or-none response in which the cell moves from ignoring a signal to responding to it very strongly.

Explanation:

Positive feedback can be described as an example of feedback, which is a natural mechanism that amplifies the action of a system.

It can be better be explained further, as a situation whereby the blood pressure decreases and the response of the body also makes or causes the blood pressure to decrease the more.

Other examples of a positive feedback also include blood clotting, ripening of fruits , uterus muscle contraction, resulting to the stretching of the uterus during pregnancy.

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