B5 Questions

Homeostasis

What is homeostasis and why is it important?

Homeostasis is the regulation of conditions inside your body and cells to maintain a stable internal environment in response to changes in both internal and external changes. It is important because it keeps the conditions in your body stable at all times.

Which three components make up the automatic control systems in the body?

• Receptors

• CNS

• Effectors

What is a stimulus?

A change in the environment.

The Nervous System and Investigating Reaction Time

What makes up the central nervous system in vertebrates and what does it do?

The spinal cord and brain make up the CNS. The CNS coordinates a response when it receives information from receptors. This response is carried out by effectors.