Sensory System Flashcards
1
Q
Response
A
An organisms reaction to a stimulus
Turning in radiator, stopping, sitting down, running
2
Q
Neuron
A
A nerve cell
Sensory neurons: signals to brain from senses
Motor neurons: signals from brain to muscles and glands
3
Q
Brain
A
Decides on correct response
4
Q
Stimulus
A
Anything that causes a organisms’ response.
Heat, cold, door, dog
5
Q
Lens
A
Focuses light to give clear image
6
Q
Pupil
A
Allows light in the eye
7
Q
Optic nerve
A
Carries messages to the brain
8
Q
Retina
A
Contains light-sensitive cells
9
Q
Iris
A
Controls light entering the eye
10
Q
Motor neurons
A
Messages from brain
11
Q
Sensory neurons
A
Messaged to brain
12
Q
Spinal cord
A
Carries messages to and from the brain
13
Q
The eye
A
Detects light and distinguishes colour
Made up of sclera, choroid, optic nerve
14
Q
Cornea
A
Focuses light
15
Q
Ciliary muscle
A
Changes shape of lens
