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
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
