The Nervous System

Question 1

Define Homeostasis

Answer 1

the regulation of the internal conditions of a cell or organism to maintain optimal conditions

Question 2

Why does Homeostasis need to maintain optimal conditions

Answer 2

For enzyme action and cell functions

Question 3

Three conditions the body needs to maintain

Answer 3

Blood glucose levels
Body temperature
Water levels

Question 4

What do the two automatic response systems involve

Answer 4

Nervous responses or chemical responses

Question 5

Define Stimuli

Answer 5

Changes in environment

Question 6

List the receptor cells and what stimulus they detect

Answer 6

Retina- light
Ear- sound
Nose- chemicals in the air
Mouth- chemicals in food
Skin- touch, pressure, pain, temp

Question 7

Name the 3 coordination centres in the body

Answer 7

Brain
Spinal Cord
Pancreas

Question 8

Describe what each coordination centre coordinates

Answer 8

Brain- coordinates information from receptor cells, sends signals to muscles and glands
Spinal Cord- coordinates messages from the brain and receptor cells and coordinates reflexes
Pancreas- coordinates the glucose levels in the blood

Question 9

What is an effector

Answer 9

A muscle or gland