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Biol 252 Exam 4 Questions and Answers with Verified Solutions Graded A 2024 $12.99   Add to cart

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Biol 252 Exam 4 Questions and Answers with Verified Solutions Graded A 2024

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what nervous system does the digestive system use -Correct Answer Enteric Nervous System what covers the digestive tract -Correct Answer internal lumen Ingestion -Correct Answer Taking food in Propulsion -Correct Answer Moving through GI tract Digestion -Correct Answer mechanical and ch...

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Biol 252 Exam 4



Biol 252 Exam 4 Questions and Answers
with Verified Solutions Graded A 2024
what nervous system does the digestive system use -Correct Answer ✔Enteric Nervous
System

what covers the digestive tract -Correct Answer ✔internal lumen

Ingestion -Correct Answer ✔Taking food in

Propulsion -Correct Answer ✔Moving through GI tract

Digestion -Correct Answer ✔mechanical and chemical break down of food

Absorption -Correct Answer ✔Passing end products from lumen to blood and lymph

Tissue of lumen -Correct Answer ✔1. Mucosa
2. Submucosa
3. Muscularis externa
4. Serosa

Smooth Muscle layers of the stomach -Correct Answer ✔1. longitudinal
2. circular
3. oblique

what does the surface of the epithelium secrete -Correct Answer ✔mucin

what leads to gastric glands -Correct Answer ✔gastric pits

what do gastric glands secrete -Correct Answer ✔gastric juice to lumen

gastric juice + digested food -Correct Answer ✔chyme

Gastric gland secreting cells -Correct Answer ✔1. Mucous neck cells
2. Parietal cells
3. Chief cells
4. Enteroendocrine cells

Mucous Neck Cells -Correct Answer ✔Secrete thin mucous layer

Parietal Cells -Correct Answer ✔secrete intrinsic factor and HCl



Biol 252 Exam 4

, Biol 252 Exam 4


Chief cells -Correct Answer ✔secrete pepsinogen

Enteroendocrine cells -Correct Answer ✔secrete hormones and paracrine messengers
that regulate digestion

Role of HCl -Correct Answer ✔pepsin synthesis and activity, breaking down cell walls of
plant foods, defend pathogens

make up of gastric juice -Correct Answer ✔muscous + HCl + Pepsinogin

Peristaltic Waves -Correct Answer ✔rhythmic contractions to move food to pylorus done
by pacemaker cells

Chyme -Correct Answer ✔- Either delivered in small amounts to duodenum
- Forced backward to stomach for more mixing

Parts of the small intestine -Correct Answer ✔duodenum, jejunum, ileum

Duodenum -Correct Answer ✔lined by muscosa layer with circular folds slowly runs
chyme for full absorption

Increased surface area of duodenum -Correct Answer ✔deep circular folds in mucosa
and submucosa with villi

Microvilli -Correct Answer ✔tiny projections of absorptive cells containing brush border
enzymes and assist carb and protein digestion

What is the small intestine made of -Correct Answer ✔Absorptive cells
goblet cells: secrete mucin
Enteroendocrine cells: secrete hormones

Intestinal cell Crypts -Correct Answer ✔secrete electrolyte water mix

Mix + mucous -Correct Answer ✔alkaline intestinal juice

small intestine stem cells -Correct Answer ✔proliferate, migrate and replace dying
epithelial cells

Bile -Correct Answer ✔Alkaline solution to neutralize acidic chyme in the duodenum

bile salts -Correct Answer ✔assist in emulsifying fats in duodenum and digestion and
absorption of fats and cholesterol




Biol 252 Exam 4

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