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Vocab
48.2 49.1 49.2
42
Biology
10th Grade
04/25/2011

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Cards

Term
digestion
Definition
process of breaking down food
Term
gastrointentinal track
Definition
digestive track
Term
saliva
Definition
water muscas salivary amylase
Term
pharynx
Definition
passageway for air and food
Term
epiglottis
Definition
flap of tissue
Term
peristalis
Definition
rythmic muscular contractions and relaxations
Term
gastric fluid
Definition
chemical digestion in the stomach
Term
ulcer
Definition
sore in stomach
Term
cardiac sphincter
Definition
muscle located between esophagus and stomach
Term
chyme
Definition
formed mixture
Term
pyloric sphincter
Definition
muscle between stomach and small intestine
Term
gallbladder
Definition
saclike organ that stores and concentrates bile
Term
villi
Definition
fingerlike projectiles
Term
colon
Definition
final organ of digestion
Term
nervous system
Definition
complex network of cells that communicate with eachother
Term
neuron
Definition
nerve cell
Term
dendrites
Definition
membrane covered extensions
Term
axon
Definition
long membrane bound projection
Term
action potentials
Definition
electrical signals
Term
axon terminal
Definition
ending of the axon
Term
myelin sheath
Definition
covers axons
Term
synapes
Definition
neurons communicate with other neurons
Term
neurotransmitters
Definition
electrical activity in the neuron
Term
membrane potential
Definition
difference in the electrical charge across the cell
Term
resting potential
Definition
charge difference
Term
refractory period
Definition
neuron cannot send a signal
Term
central nervous system
Definition
brain and spinal cord
Term
perihperal nervous system
Definition
neurons that have cell bodies
Term
cerebrum
Definition
largest portion of the human brain
Term
cerebral cortex
Definition
folded outer layer of the cerebrum
Term
brain stem
Definition
below cerebrum and links it to the spinak cord
Term
thalamus
Definition
upermost relay center
Term
hypothalamus
Definition
helps maintain homeostasis
Term
medulla oblongata
Definition
controls your body
Term
cerebellum
Definition
helps coordinate muscle action
Term
nerves
Definition
bundles axons
Term
sensory reseptors
Definition
dorsal roots carry signals into the central nervous system
Term
motor neurons
Definition
carry info from contral nervous system to muscles and glands
Term
interneurons
Definition
relay info between other neurons
Term
somatic nervous system
Definition
neurons that control the movement of skeletal muscles
Term
reflexes
Definition
involuntary and often self protective movements
Term
autonomic nervous system
Definition
controls inner body conditions
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