Why are mammalian reflexes so fast? (Check all that apply.)
A)They use neurons with extra-wide axons.
B)They complete the sensory input-to-motor output circuit in only 2-3 neurons.
C)They do not send signals to the brain and back.
D)They activate a large number of sensory neurons,which speeds things up after the motor neuron performs spatial summation.
E)There was a selective advantage to evolve rapid responses to certain types of stimuli.

Question

Quizplus · Accepted Answer

Mammalian reflexes are fast because they involve a simple circuit with only a few neurons (B), they often bypass the brain to reduce processing time (C), and there was evolutionary pressure to develop quick responses to certain stimuli for survival (E).

Why Are Mammalian Reflexes So Fast? (Check All That Apply