ch 21 science

basic functioning unit of the nervous system, made up of a cell body, dendrites, and axons

• neuron

• axon

• synapse

• central nervous system

central nervous system

division of the nervous system, made up of the brain and spinal cord

• central nervous system

• peripheral nervous system

• cerebrum

• brain stem

simple innate behavior, such as yawning or blinking, that is an automatic response and does not involve a message to the brain; automatic, involuntary response to a stimulus; controlled by the spinal cord

• reflex

• cerebrum

• dendrite

• cerebellum

regulation of an organism's internal, life-maintaining conditions.

• Homeostasis

• cerebellum

• central nervous system

• reflex

neuron structure that receives messages and sends them to the cell body

• dendrite

• synapse

• axon

• neuron

peripheral nervous system

division of the nervous system, made up of all the nerves outside the CNS; connects the brain and spinal cord to other body parts

• peripheral nervous system

• central nervous system

• cerebrum

• cerebellum

small space across which an impulse moves from an axon to the dendrites or cdl body of another neuron.

• synapse

• axon

• neuron

• brain stem

specialized organ that, when stimulated, initiates a process of sensory perception

• sense organ

• retina

• olfactory cell

• taste bud

light-sensitive tissue at the back of the eye; contains rods and cones.

• sense organ

• retina

• olfactory cell

• taste bud

nasal nerve cell that becomes stimulated by molecules in the air and sends impulses to the brain for interpretation of odors.

• sense organ

• retina

• cochlea

• olfactory cell