BioS 252 lecture - –Answer development, growth, maintance and re...

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BioS 252 lecture

• Jan 9th - digestive system- why do humans needs food

–Answer development, growth, maintance and repair -organic material is broken down to obtain building blocks

• Functions of digestive system

–Answer -ingestion -secretion -motility -digestion -absorption -defecation

• Ingestion

–Answer Food into mouth

• Secretion

–Answer release of water, acid, buffers, and enzymes into GI tract

• Motility

–Answer Mixing and propulsion, churning and movement of food through GI tract

• Digestion

–Answer Mechanical and chemical breakdown of food

• Absorption

–Answer 1 / 2

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Passage of digested products from GI tract into blood and lymph

• Defecation

–Answer Elimination of feces from the GI tract

• GI tract

–Answer Continuous tube that extend from the mouth to the anus though the thoracic and abdominopelvic cavity

• Organs in the GI tract

–Answer mouth, pharynx, esophagus, stomach, small intestine, large intestine etc

• Accessory organs

–Answer aid in the physical breakdown and chemical breakdown of food

• Accessory organs examples

–Answer teeth, tongue, salivary glands, liver, gallbladder, pancreas and the 3 glands

• Week 2 reading quiz - Which modification of the small intestine creates a brush border

appearance upon microscopic examination?–Answer microvilli

• Acinar cells of the pancreas release

–Answer

–Answer pancreatic juice.

• What liver secretion is responsible for the emulsification of lipids in the duodenum?

–Answer bile

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