Notes in Physio lecture 2 - GI 1 overview

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Published	01/29/2024	what are the main functions GI system
Published	01/29/2024	Digestion – {{c1::breakdown of complex food into smaller subunits}} Mechanical digestion of the GI system (action and location){{c2::chewing = mouth}}…
Published	01/29/2024	Secretions of the GI system{{c1::exocrine}} secretions like {{c2::enzymes}}, {{c2::mucus}} and {{c2::ions}} go into the {{c3::lumen}}{{c1::endocrine}}…
Published	01/29/2024	absorption in the GI tract occurs via1. transport of water, ions, and nutrients from the lumen across {{c1::epithelium}} and into {{c2::blood or lymph…
Published	01/29/2024	{{c1::contractions}} of {{c2::smooth muscle}} {{c3::crush}}, {{c3::mix}} and {{c3::propel}} lumen contents
Published	01/29/2024	elimination/ excretion is done in the form of {{c1::fecal matter}} which is usually...- {{c1::bacteria and non digested/ non absorbed fibers (i.e. cel…
Published	01/29/2024	the GI tract is ...- vulnerable to microorganisms because {{c1::major pathway of entry}} - site where most substances enter body by {{c1::traversing t…
Published	01/29/2024	what are the accessory organs of the GI system and their function{{c1::Mouth}} – {{c2::teeth, tongue for mechanical digestion }}{{c1::Salivary gl…
Published	01/29/2024	what are the organs of the GI tract and their main functions{{c1::Mouth – oral cavity }}→ {{c2::food intake, size reduction by chewing}} {{c1::Pharynx…
Published	01/29/2024	The abdominal cavity is made of the ...{{c1::Peritoneum}} -- {{c2::membranes of abdominal cavity that secrete fluid}} 1. {{c3::Visceral – covers exter…
Published	01/29/2024	Ascites -- {{c1::abdominal swelling because of accumulation of fluid in peritoneal cavity}} Potential causes and why it would cause ascites 1. {{…
Published	01/29/2024	The GI blood supply comes from the{{c1:: abdominal aorta}}the {{c1::inferior mesenteric}} supports the {{c2::lower colon}} and {{c2::rectum}}the …
Published	01/29/2024	histology of the GI tract- the lumen is the {{c1::inner cavity of the tract}}- there are the same 4 tunics throughout the tract but {{c1::they vary st…
Published	01/29/2024	Mucosa - {{c1::Moist epithelium layer lining the lumen}} - {{c1::Has MALT (mucosa associated lymphoid tissue)}} from inner to outer layers of muc…
Published	01/29/2024	Submucosa – {{c1::areolar connective tissue (collagen, elastin) with nerves, blood vessels, glands and lymphatic vessels}}
Published	01/29/2024	Muscularis externa – {{c1::circular and longitudinal muscle}} - Contractions → {{c2::segmentation + peristalsis}}
Published	01/29/2024	Outermost layer of the GI tract – {{c1::fibrous connective tissue}} {{c1::Serosa}} – {{c2::protective visceral peritoneum (stomach, intestines)}} {{c1…
Published	01/29/2024	Enteric nervous system (also known as {{c1::intrinsic nervous system}}) - {{c2::has two plexuses}}1. {{c1::Myenteric Plexus (Auerbach’s plexus)}} - lo…
Published	01/29/2024	Mucosal epithelium - functions: {{c1::protective}}, {{c1::absorptive}}, or {{c1::secretory}}- varies from one part of tract to next (type and where)&n…
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