| A | B |
|---|
| Muscle Tissue | controls internal movement |
| Epithelial Tissue | covers surface of body/organs |
| Connective Tissue | binds different parts of the body together |
| Nervous Tissue | receives and analyzes body messages |
| Feedback Inhibition | processes shut down |
| Neuron | cells that transmit impulses |
| Cell Body | largest part of neuron |
| Dendrite | short, branched extensions |
| Axon | fibers that carry impulse |
| Myelin Sheath | insulating membrane |
| Resting Potential | difference in electrical charge across the membrane of a neuron |
| Action Potential | reversal of charges |
| Threshold | minimum level of stimulus |
| Synapse | location where transfer can occur |
| Neurotransmitter | chemicals used to transfer impulse |
| Central Nervous System | brain and spinal cord |
| Meninges | layers of connective tissue |
| Cerebrospinal Fluid | shock absorbers for brain |
| Cerebrum | largest region of brain; voluntary activity |
| Cerebellum | region in back of skull;coordinates body movements |
| Brain Stem | connects brain and spinal cord |
| Thalamus | receives messages from organs |
| Hypothalamus | control center fro recognition |
| Reflex | quick, automatic response |
| Sensory Receptor | reacts to light, taste, smell |
| Pupil | small opening in iris |
| Lens | part behind the iris that focuses for distance |
| Retina | innermost layer of the eye |
| Rod | sensitive to light, no colors |
| Cone | less sensitive, see colors |
| Cochlea | fluid filled sac, sends impulses from inner ear |
| Semicircular Canal | in inner ear; help maintain balance |
| Taste Bud | sense organs that detect flavor |
| Drug | substance causing a change in the structure or function of the body |
| Stimulant | speeds up actions of nervous system |
| Depressant | slows down actions of nervous system |
| Addiction | uncontrolled need for drug |
| Fetal Alchol Syndrome | birth defects caused by drinking |
| Drug Abuse | Use of a drug in a way in which doctors do not approve |
