A Simple Nervous System

Question

A simple nervous system
A) must include chemical senses, mechanoreception, and vision.
B) includes a minimum of 12 effector neurons.
C) has information flow in only one direction: toward an integrating center.
D) has information flow in only one direction: away from an integrating center.
E) includes sensory information, an integrating center, and effectors.

Accepted Answer

A simple nervous system includes sensory information (chemical senses, mechanoreception, vision), an integrating center (which processes and interprets the sensory information), and effectors (which carry out the response to the sensory input). Information flows both towards and away from the integrating center in order to coordinate a response. There is no set minimum or specific number of neurons required for a simple nervous system.