Chapter 33.3, Problem 2MI

Summary Introduction

To define:

The term stimulus.

Introduction:

The basic working unit found in the brain is the neuron. Neuron is the specialized cell that helps in the transmission of sensory information. These cells transport information to muscle, nerve cells, and glands.

Explanation of Solution

The thing that causes a reaction, like, energy and excitement is termed as the stimulus. In biology, stimulus is detectable change that is caused in chemical or physical nature of an organism in response to external and internal environment.