Nerves and homeostasis

Which type of neurone transmits a signal from a sense organ to the central nervous system?

• Sensory

• Relay

• Motor

• Nina

Which type of neurone transmits a signal from the central nervous system to an effector such as a muscle?

• Sensory

• Relay

• Motor

• Nina

What is a synapse?

• A type of reflex action

• A gap between two neurones

• The long fibre of a nerve cell

• A type of neurone

Which part of the nervous system is not involved in producing reflex actions?

• Brain

• Spinal cord

• Receptors

• Sensory neurone

What is the eye an example of?

• A stimulus

• A sense organ

• A relay neurone

• A sensory neurone

Which part of the eye controls the amount of light entering it?

• The cornea

• The iris

• The retina

• The sclera

Which two parts of the eye are involved in focusing?

• The lens and the cornea

• The lens and the retina

• The cornea and the optic nerve

• The retina and the optic nerve

What happens to the ciliary muscles when you see a distant object

• They relax

• They contract

• They slacken

• They tighten

What happens to the suspensory ligaments when you focus on a distant object

• They contract

• They relax

• They stretch

• They slacken

What happens to the lens when you focus on distant objects?

• It gets bigger

• It gets smaller

• It gets thinner

• It gets fatter