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NCSU bio 240 Lab exam 4
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NCSU bio 240 Lab exam 4
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NCSU bio 240 Lab exam 41 to 1.5 liters - ANS-how much saliva we make a day
20 deciduous teeth - ANS-how many teeth do we have as a kid and what are they
called
32 permanent teeth - ANS-how many teeth do we have as adults and what are they
called
6 main functions of digestive system - ANS-ingestion, motility, secretion, digestion,
absorbtion, elimination
absorbtion - ANS-membrane transport of digestive moelcues such as eletrolyes,
vitamins or water from the tract into blood or lymph.
abundant superficial blood vessels - ANS-why lips are red
baroreceptors - ANS-detect stretch or pressure of a particular region
benefits of saliva - ANS-initates chem breakdown of starch in oral cavity
acts as watery medium into which food molecules are dissolved
cleans oral cavity structures
helps initbit bacteria growth
bolus - ANS-when food becoems mixed with intestinal materials to form a wet mass
saliva helps form this
cardia - ANS-small entry way from esophagus into stomach lumen
cardiac orifice - ANS-house fo the cardiac sphincter
cementum - ANS-what covers each tooth root
cheeks - ANS-mainly comprised of the buccinator mussle and stop at the lips
the buccinator muscles press the cheek against the teeth
chemical digestion - ANS-when enzymes break chemical bonds to change larger
complex molecules into smaller ones
, chemcially breaking down food
chemoreceptors - ANS-detect precense of specific substances of passing contents
chief cells - ANS-most nemerous stomach cells in gastric glands
make pepsinogen which makes pepsin
chyme - ANS-when the bolus reaches the stomach and mixes with the digestive
enzymes
dentin - ANS-primary mass of the tooth, harder than bone
dentition - ANS-teeth collectivly known as
digestion - ANS-breakdown of food to smaller units that may be absorbed by GI tract
elimination - ANS-get rid of indigestible stuff that cant be absorbed
enamel - ANS-tough durable layer that forms the crown
esophagus - ANS-where the bolus goes after the pharynx until it gets to the stomach
falciform ligament - ANS-flat, thin, cresent shaped peritoneal fold that attatches liver to
the internal surface of the anterior abdomen wall.
fauces - ANS-openings between oral cavity and oropharynx
function of esophagus - ANS-soft plate back to normal
superior sphincter opens to let blous in then closes
blus moves down esophagus
inferiror esophageal sphincter opens and closes to let blous in stomach
fundus - ANS-top, dome shaped, part of the stomach that connects to the diaphram
G-cells - ANS-wildy distrubted through gastric glands of stomach
secrete gastrin which stimulates stomach motility
gastric emptying - ANS-movement of acidic chyme from stomach thorugh pyloric
sphincter to the duodenum.
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