Nervous and Endocrine Systems
Terms
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- Neuron
- working unit of the nervous system
- Dendrite
- branch of neuron that receives messages and sends them to the cell body
- Axon
- branch of neuron that carries messages, or impulses, away from the cell body
- Synapse
- small space between neurons
- Central Nervous System
- contains the brain and spinal cord
- Peripheral Nervous System
- made up of all nerves outside the central nervous system
- Cerebrum
-
divided into two hemispheres
KNOW:
senses
memory
thinking - Cerebellum
-
KNOW:
voluntary muscles
balance
muscle tone - Brain Stem
-
most important part of the brain
KNOW:
controls heartbeat
breathing
blood pressure
(involuntary muscles) - Reflex
- automatic response to a stimulus
- Cochlea
- structure in the inner ear, shaped like a snail shell, contains fluid to vibrate, sending impulses to the brain by the auditory nerve
- Retina
- light sensitive tissue at the back of the eye,
- Olfactory Cell
- sensory recepters in the nasal passages that respond to gas molecules in the air and send inmpulses to the brain for the interpretation of odors
- Taste Bud
- sensory recepter in the mouth (tongue) respond to chemical stimuli
-
Hormone
Target Tissue - endocrine chemicals that are produced from glands directly into the bloodstream and that affect target tissues