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EXSS 175 Lecture 10: The Digestive System Exam Practice Questions and Answers (100% Pass)
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EXSS 175 Lecture 10: The Digestive System Exam Practice Questions and Answers (100% Pass)
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©PREP4EXAMS @2024 [REAL EXAM DUMPS] Wednesday, July 17, 2024 1:27 AMEXSS 175 Lecture 10: The Digestive System Exam
Practice Questions and Answers (100% Pass)
digestive system - ✔️✔️organs that break down food
GI tract functions - ✔️✔️-mouth: mastication, swallow
-pharynx & esophagus: transportation
-stomach: mechanical disruption; absorption of water and alcohol
-small intestine: chemical and mechanical digestion and absorption
-large intestine: absorb electrolytes and vitamins
-rectum & anus: defecation
organization of GI tract - ✔️✔️-tube opens at both ends
-transports and processes food
-2 divisions: upper and lower GI tract
-functional segments: mouth, esophagus, stomach, small intestine, and large intestine
-accessory structures: teeth, tongue, salivary glands, liver, gallbladder, and pancreas
6 basic functions - ✔️✔️-ingestion
-secretion
-mixing and propulsion
-digestion
-absorption
-defecation
digestion - ✔️✔️-ingestion: taking food into the mouth, mastication: chewing
-secretion: the release of water, acid, buffers, and enzymes into the tract
-mixing and propulsion: churning and propulsion of food (motility, deglutition, peristalsis)
-digestion (mechnical adn chemical)
-absoprtion (passing end products from GI tract into blood or lymph)
-defecation (emptying of the rectum, eliminated indigestible substances
mouth - ✔️✔️-only part of digestive system invovled in ingestion
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, ©PREP4EXAMS @2024 [REAL EXAM DUMPS] Wednesday, July 17, 2024 1:27 AM
-begins propulsive process
-lips and cheeks: buccinator muscles
-vestibule: b/w cheeks and teeth
-oral cavity proper: roof, floor
oral cavity - ✔️✔️-gingiva: gums
-palates: roof of mouth
--hard palate: anterior (maxilla and palatine bones, seperates oral and nasal cavities)
--soft palate (muscular arch posterior to hard palate)
-uvula
-tongue
Uvula - ✔️✔️-cone-shaped projection of soft palate
-swallowing (drawn upward, closes off nasopharynx)
tongue - ✔️✔️-moves food through oral cavity
-swallowing and speech
-lingual frenulum (anchors tongue, limits posterior motion)
salivary glands - ✔️✔️-parotid gland (largest, anterior and inferior to ear, mumps infection)
-submandibular gland (inferior to body of mandible)
-sublingual gland (inferior to tongue on floor of oral cavity)
saliva - ✔️✔️--99.5 percent water, .5 percent solutes
--wets food --> easier swallowing
--dissolves food for tasting
--chemical digestion of starch (salivary amylase)
-enzyme (lysozyme): helps destroy bacteria
--protects mouth from infection
mumps - ✔️✔️-Myxovirus that attacks the parotid gland
-symptoms: inflammation/enlargement of the parotid, fever, discomfort, sore throat
-vaccine available since 1967
-sterility rarely possible in males w/ testicular involvement
teeth - ✔️✔️-2 dentitions (aka sets of teeth)
--deciduous (primary): milk teeth or baby teeth
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