B10.2 The Nervous System

Question 1

Why is the nervous system needed ?

Answer 1

Allows us to react to our surroundings and coordinate our response

Question 2

What are receptors ?

Answer 2

Groups of cells which are sensitive to a stimulus and they change stimulus energy
Eh light energy into electrical impulses

Question 3

Sensory organ: eyes what is the receptor/ stimulus ?

Answer 3

Light

Question 4

Sensory organ: nose what is the receptor/ stimulus ?

Answer 4

Smell/ olfactory (chemical

Question 5

Sensory organ: ears what is the receptor/ stimulus ?

Answer 5

Sound (kinetic)

Question 6

Sensory organ: tounge what is the receptor/ stimulus ?

Answer 6

Taste (chemical)

Question 7

Sensory organ: skin what are the two receptor/ stimulus ?

Answer 7

Pressure (touch)
Temperature

Question 8

What does the central nervous system consist of ?

Answer 8

The brain and spinal cord only
All the information from the sensory organs are sent

Question 9

What does the central nervous system do ?

Answer 9

Coordinates a response to stimuli

Question 10

What do neurons do ?

Answer 10

Transit information to and from the central nervous system as electrical impulses

Question 11

What are the two effectors ?(responses to a stimuli- change in environment)

Answer 11

Muscles that contract
Gland that secrete hormones