BIOL 325 Physiology Name: Homework #12. Digestion Section: 1. (2pts) For the fea
ID: 3481570 • Letter: B
Question
BIOL 325 Physiology Name: Homework #12. Digestion Section: 1. (2pts) For the features below indicate whether they are associated with the muscularis externa, submucosa, serosa, or mucosa. supports absorption of nutrients into the blood vessels and lacteals. produces a low friction outer surface. produces movements including peristalsis and segmentation. region responsible for digestive secretions including stomach acid, some enzymes and hormones. 2. (5pts) Fill in the chart below. Please use the phrase 'almost none' for the lower two rows if it applies. Feature Mouth Esophagus Stomach Small Intestine Large Intestine What epithelium lines the mucosa? Chemical Digestion of what macromolecules occurs here? (carbs, fats, proteins, nucleic acids) Absorption of what macromolecules occurs here? (carbs, fats, proteins, nucleic acids)Explanation / Answer
Submucosa supports absorption of nutrient into blood vessel.
Serosa -low friction outer surface.
Muscularus externa -help inperistlasisal and segmentation
Mucosa -responsible for digestuv secretion.
Mouth -stratified squamous epithellium
Digestion of carbohydrates starts here
No absorption
Oesophagus -stratified squamous epiyhellium
No absorption and digestion
Stomach - simple columnar epithellium
Digestion of carbohydrate ,protein starts here.
No absirption.
Small intenstine-cilliated columnar epithellium
Digstion of all molecule starts here and also absorption
Large intenstine- columnar epithellium
No digestion
Absorption of carbohydrate
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