Which type of neurone transmits a signal from a receptor to the central nervous system (CNS)?
Sensory
Association
Motor
Which type of neurone transmits a signal from the CNS to a muscle?
What is a synapse?
A type of reflex action.
A gap between two neurones.
The long fibre in a nerve cell.
Which part of the CNS is not involved in producing reflex actions?
Brain
Spinal cord
Receptors
The eye is an example of...
A stimulus.
A sense organ.
A relay neurone.
Which part of the eye controls the amount of light entering?
The cornea.
The iris.
The retina.
Which two parts of the eye are involved in the refraction of light?
The lens and cornea.
The lens and retina.
The cornea and optic nerve.
What happens when the eye accommodates to see a near object?
The ciliary muscles contract and the suspensory ligaments slacken.
The ciliary muscles relax and the suspensory ligaments slacken.
The ciliary muscles contract and the suspensory ligaments tighten.
A neurone's myelin sheath acts as which of these?
A long extension.
A conductor.
An insulator.