Cells that carry information through your nervous system.
What are neurons?
100
Includes the brain and spinal cord.
What is the central nervous system?
100
Light first strikes this part of the eye.
What is the cornea?
100
The ears convert what type of stimulus into an impulse that your brain interprets?
What is sound?
100
Sends an impulse to a muscle or gland.
What is a motor neuron?
200
The long structure leading away from the cell body in a neuron.
What is the axon?
200
Includes all of the nerves outside the central nervous system.
What is the peripheral nervous system?
200
The opening through which light enters.
What is the pupil?
200
The membrane that vibrates when sound waves strike it.
What is the eardrum?
200
Picks up a stimulus and converts it to a nerve impulse.
What is a sensory neuron?
300
A bundle of neurons.
What is a nerve?
300
Controls voluntary actions like movement.
What is the somatic nervous system?
300
The pigmented part of the eye that controls the size of the pupil.
What is the iris?
300
The snail-shaped tube containing sound receptors.
What is the cochlea?
300
The part of the brain that interprets sensory input, controls movement, and carries out complex mental processes.
What is the cerebrum?
400
Branchlike structures that pick up impulses from another neuron.
What are dendrites?
400
Controls involuntary actions like digesting food.
What is the autonomic nervous system?
400
The light sensitive part of the eye turns light into an impulse.
What is the retina?
400
The structures of the ear that help to maintain balance.
What are the semicircular canals?
400
People with this condition can see nearby objects but not distant objects.
What is nearsightedness?
500
The space between two neurons.
What is the synapse?
500
A network of nerves that branch out from the brain and spinal cord and connect to the rest of the body. Contains the somatic and autonomic nervous systems.
What is peripheral nervous system?
500
The nerve that carries messages from the eye to the brain.
What is the optic nerve?
500
The final bone that transmits sound to the inner ear.
What is the stirrup?
500
Receptor cells in the retina that allow you to see color.