Nervous System Flashcards
1
Q
Basic nervous system path
A
Stimulus Receptor Information is sent to the brain (CNS) which coordinates what response is required Effector usually a muscle Response
2
Q
Purpose of the iris
A
Controls light entering the eye
3
Q
Pupil
A
Space between iris which light passes through
4
Q
Cornea
A
Transparent front part of the eye that allows light to enter the eye causes some refraction.
5
Q
Conjuctiva
A
Thin transparent protective covering
6
Q
Retina
A
Light sensitive cells are found
7
Q
Lens
A
Refracts light
8
Q
Optic nerve
A
Optic nerve contains neurones carrying info to the brain
9
Q
Process of focus in on a distant object
A
Cilary muscles relax, causing the suspensary ligaments to become taught causing the lens to become thinner. Less refraction of light
10
Q
Near object
A
Ciliary muscles contract causing the suspensory ligaments to become loose and the lens buldges to form a sharp image
