Beth Anderson's Extra Credit due 1/22/10 on the digestive system

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Beth Anderson's Extra Credit due on 1/22/10 on the digestive system

gastroenterology

the medical professions that study the structures, functions, and disorders of the digestive tract for the upper end are called what?

proctology

the medical professions that study the structures, functions, and disorders of the digestive tract for the lower end are called what?

gastrointestinal tract, accessory digestive organs

what are the 2 groups of organs called that compose the digestive system

alimentary canal

another name for gastrointestinal tract

gastrointestinal tract

what organ group is composed of the mouth, most of the pharynx, esophagus, stomach, small intestine, and large intestine

accesory digestive organs

what organ group consists of the teeth, tongue, salivary glands, liver, gallbladder, and pancreas

ingestion

what basic process includes taking food into the mouth (eating)

secretion

what basic process includes the release of water, acid, buffers, and enzymes into the lumen of the tract

digestion

what basic process refers to the mechanical and chemical breakdown of foods so that the cells can absorb the nutrients

mixing and propulsion

what basic process results from the alternating contraction and relaxation of the smooth muscles

chemical, mechanical

list 2 kinds of digestion

mechanical

what type of digestion refers to the movements of the GI tract

chemical

what type of digestion consists of a series of catabolic (hydrolysis) reactions

absorption

what basic process consists of the passage of end products into blood or lymph for distribution to cells

defecation

what basic process consists of the elimination of feces

9 meters (30 feet)

how long is the alimentary canal

ventral

which cavity does the alimentary canal pass through

lumen

passageway of the digestive tube

mucosa, submucosa, muscularis, serosa

list the 4 layers of the GI tract wall (deep to superficial)

mucosa

what is the inner lining of the GI tract called

protection, secretion, absorption

what is the function of mucosa

mucosa-associated lymphatic tissue

what does MALT stand for

muscularis mucosae

thin layer of smooth muscle making folds to increase surface area

submucosa

what is made up of loose CT housing BV, LV, and nerves

muscularis

voluntary skeletal muscle found in mouth, pharynx, upper 2/3 of esophagus, and anal sphincter, involuntary smooth muscle is found everywhere else

involuntary muscularis

what is arranged in inner circular fibers and outer longitudinal fibers

myenteric plexus

what is between muscle layers in involuntary muscularis

serosa

outermost covering of organs suspended in abdominopelvic cavity

adventitia

what does the esophagus have if it lacks serosa

intestines

what does the enteric refer to in the enteric nervous system

intrinsic

what are the set of nerves in the enteric nervous system called

myenteric plexus, submucosal plexus

list the 2 plexuses of the enteric nervous system

myenteric plexus

what plexus is responsible for GI tract motility

submucosal plexus

what plexus controls secretions

extrinsic

what set of nerves does the autonomic nervous system have

parasympathetic

what stimulation increases secretion and activity by stimulating ENS

sympathetic

what stimulation decreases secretions and activity by inhibiting ENS

peritoneum

what is the largest serous membrane of the body

parietal peritoneum

what peritoneum lines the walls of the cavity

visceral peritoneum

what peritoneum covers some organs

peritoneal cavity

what is the space between the peritoneum called

greater omentum, lesser omentum, falciform ligament, mesentery, mesocolon

list the 5 major peritoneal folds

support organs, contain BV, LV, and nerves of abdominal organs

function of peritoneal folds

retroperitoneal

what is it called when organs lie behind the peritoneum (posterior abdominal wall)

mouth, oral cavity, buccal cavity

formed by cheeks, hard and soft palate, lips and tongue

mastication

what is another name for chewing

vestibule

area between cheeks

lips and cheeks

contains buccinator muscle that keeps food between upper and lower teeth

oral cavity proper

space that extends from gums and teeth to fauces

fauces

what is the opening between oral cavity and oropharynx

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