Senses And The Nervous System Flashcards
0
Q
Stimulus
A
Is something that causes a response, eg. If you get bitten.
1
Q
Sensitivity
A
Dececting and responding to a stimulus.
2
Q
Nervous System
A
Brain, spinal cord, all the nerves.
3
Q
Sensory Nerve
A
Sends a message to the brain from the sense organ.
4
Q
Motor Nerve
A
Sends a message from the brain to the muscle.
5
Q
Lens
A
Focuses the light onto the retina.
6
Q
Iris
A
Controls the amount of light entering the eye.
7
Q
Cornea
A
Allows light through.
8
Q
Pupil
A
The hole that allows light through.
9
Q
Ciliary muscle
A
Changes the shape of the lens for focusing.
10
Q
Retina
A
Contains the light sensitive cells.
11
Q
Optic Nerve
A
Carries messages to the brain.
12
Q
Messages
A
Are sent along nerves as pulses of electricity.
13
Q
The eye contains
A
The cornea, iris, lens, pupil, retina, optic nerve and ciliary muscle.
