Coordination and Response

Front

What is a reflex action?

Back

A reflex action is an automatic response to a stimulus.

Front

What happens when a sharp object stimulates the foot?

Back

The stimulus is detected by a receptor in the foot, sending an electrical impulse along a sensory neurone to the brain or spinal cord.

Front

What are the types of neurones involved in reflex actions?

Back

Motor and relay neurones are involved.

Front

What is the function of a sensory neurone?

Back

A sensory neurone carries a nerve impulse from a receptor to the central nervous system (CNS).

Front

What is the role of an effector?

Back

An effector is a part of the body that responds to a stimulus, such as a muscle or gland.

Front

What is negative gravitropism?

Back

Negative gravitropism is a growth response away from the direction in which gravity is pulling.

Front

What is the difference between rods and cones in the retina?

Back

Rods are sensitive to low light intensity and are not color sensitive, while cones are sensitive to high light intensity and color.

Front

What are the main parts of a neuron?

Back

The main parts of a neuron include the cell membrane, cytoplasm, and nucleus.

Front

What is the cornea?

Back

The cornea is a transparent tissue that covers the front of the eye and refracts light rays.

Front

What is the function of the conjunctiva?

Back

The conjunctiva is a thinner layer that protects the front surface of the eye.