Neurons, Nerve Impulses, Reflexes
a series of neurons that receives a stimulus and then causes the body to react
What is a reflect arc?
the opening through which the light enters the eye
What is the pupil?
the thin membrane between the outer ear and the middle ear
What is the eardrum?
part of the brain related to hearing
What is the temporal lobe?
chemical messengers
What are hormones?
______ carry impulses toward the cell body, and the ______ carry the impulses away
What are dendrites and axons?
when the cones are not working properly
What is colorblind?
contains the ear bones
What is the middle ear?
controls coughing and sneezing
What is the brain stem?
produces growth hormone
What is the pituitary gland?
the type of neuron responsible for receiving stimuli and carrying impulses to the central nervous system
What is a sensory neuron?
caused by a buildup of the pressure in the eye
What is glaucoma?
the structure where the nerves that go to the brain are touched by waves produced by sounds
What is the cochlea?
the largest part of the brain
What is the cerebrum?
gland that produces insulin
What is the pancreas?
neuron responsible for muscle movement
What is a motor neuron?
cataracts may develop on this part of the eye
What is the lens?
connects the pharynx and middle ear
What is the eustachian tube?
the outer layer of the cerebrum
What is the outer layer of the cerebrum?
hormone that prepares the body for emergencies
What is epinephrine?
the _____ nervous system that is composed of the brain and the spinal cord and
the _____ nervous system that is composed of the nerves and the sense organs
What is the CENTRAL nervous system
and the PERIPHERAL nervous system
the nerve that carries impulses from the eye to the brain
What is the optic nerve?
enable one to balance
What are the semicircular canals?
controls heartbeat, breathing, and other involuntary activities
What is the brain stem?
gland that functions in both the endocrine system and the digestive system
What is the pancreas?