Senses And The Nervous System Flashcards
0
Q
Stimulus
A
A stimulus is something that causes a response e.g. Someone walking by
1
Q
Sensitivity
A
Detecting and responding to a stimulus
2
Q
The eye
A
…
3
Q
Lens
A
Focuses the light onto the retina
4
Q
Iris
A
Controls the amount of light entering the eye
5
Q
Cornea
A
Allows light through
6
Q
Pupil
A
The hole that allows light through
7
Q
Ciliary muscle
A
Changes the shape of the lens for focusing
8
Q
Retina
A
Contains the light sensitive cells
9
Q
Optic nerve
A
Carries messages to the brain
10
Q
Nervous system
A
Brain, spinal cord, all the nerves
11
Q
Sensory nerve
A
Sends a message to the brain from the sense organ
12
Q
Motor nerve
A
Sends a message from the brain to a muscle
13
Q
Messages
A
Are sent along nerves as pulses of electricity
14
Q
The eye contains
A
The cornea, iris, lens, pupil, retina, optic nerve and ciliary muscle.
