BIOL 215 EXAM 3 - DIGESTIVE SYSTEM
UPDATED ACTUAL Exam Questions and
CORRECT Answers
digestive tract - CORRECT ANSWER - also called alimentary tract or canal
regions of digestive tract - CORRECT ANSWER - - oral cavity
- pharynx
- esophagus
- stomach
- small intestine
- large intestine
- anus
functions of the digestive system - CORRECT ANSWER - 1. ingestion
2. mastication
3. propulsion
4. mixing
5. secretion
6. digestion
7. absorption
8. elimination
ingestion - CORRECT ANSWER - intake of solid or liquid food into the stomach through
the oral cavity
mastication - CORRECT ANSWER - breaks food into smaller particles for better
penetration of digestive enzymes
,propulsion - CORRECT ANSWER - movement of food through the digestive tract
deglutition - CORRECT ANSWER - swallowing (oral cavity to esophagus)
peristalsis - CORRECT ANSWER - rhythmic muscular contractions (esophagus to the
large intestine)
mass movements - CORRECT ANSWER - contractions in large intestine (large intestine
to anus)
mixing - CORRECT ANSWER - segmental contraction that move material back and forth
- break food into smaller pieces
- mix particles with digestive secretions
secretion - CORRECT ANSWER - lubricate, liquefy, buffer, and digest food
mucus - CORRECT ANSWER - lubricates food and coats lining to protect from
mechanical abrasion, acid, and digestive enzymes
water - CORRECT ANSWER - liquefies food to make it easier to digest and absorb
bile - CORRECT ANSWER - emulsifies fats
enzymes - CORRECT ANSWER - breaks down
, digestion - CORRECT ANSWER - breakdown of large organic molecules into component
parts:
- mechanical digestion: mastication; mixing
- chemical digestion: enzymes
absorption - CORRECT ANSWER - movement from digestive tract into blood or lymph
elimination - CORRECT ANSWER - waste products of digestive (feces) are removed
from body by defecation
4 Tunics - CORRECT ANSWER - 1. Mucosa
2. Submucosa
3. Muscularis
4. Serosa/Adventitia
Mucosa - CORRECT ANSWER - inner most layer
3 components of mucosa - CORRECT ANSWER - 1. mucous epithelium
2. lamina propria
3. muscularis mucosae
mucous epithelium - CORRECT ANSWER - - stratified squamous in mouth, pharynx,
esophagus and anal canal
- simple columnar epithelium in the rest of the tract (secret and absorption)
lamina propria - CORRECT ANSWER - - loose connective tissue
- epithelium extends into the lamina propria to form glands and crypts
UPDATED ACTUAL Exam Questions and
CORRECT Answers
digestive tract - CORRECT ANSWER - also called alimentary tract or canal
regions of digestive tract - CORRECT ANSWER - - oral cavity
- pharynx
- esophagus
- stomach
- small intestine
- large intestine
- anus
functions of the digestive system - CORRECT ANSWER - 1. ingestion
2. mastication
3. propulsion
4. mixing
5. secretion
6. digestion
7. absorption
8. elimination
ingestion - CORRECT ANSWER - intake of solid or liquid food into the stomach through
the oral cavity
mastication - CORRECT ANSWER - breaks food into smaller particles for better
penetration of digestive enzymes
,propulsion - CORRECT ANSWER - movement of food through the digestive tract
deglutition - CORRECT ANSWER - swallowing (oral cavity to esophagus)
peristalsis - CORRECT ANSWER - rhythmic muscular contractions (esophagus to the
large intestine)
mass movements - CORRECT ANSWER - contractions in large intestine (large intestine
to anus)
mixing - CORRECT ANSWER - segmental contraction that move material back and forth
- break food into smaller pieces
- mix particles with digestive secretions
secretion - CORRECT ANSWER - lubricate, liquefy, buffer, and digest food
mucus - CORRECT ANSWER - lubricates food and coats lining to protect from
mechanical abrasion, acid, and digestive enzymes
water - CORRECT ANSWER - liquefies food to make it easier to digest and absorb
bile - CORRECT ANSWER - emulsifies fats
enzymes - CORRECT ANSWER - breaks down
, digestion - CORRECT ANSWER - breakdown of large organic molecules into component
parts:
- mechanical digestion: mastication; mixing
- chemical digestion: enzymes
absorption - CORRECT ANSWER - movement from digestive tract into blood or lymph
elimination - CORRECT ANSWER - waste products of digestive (feces) are removed
from body by defecation
4 Tunics - CORRECT ANSWER - 1. Mucosa
2. Submucosa
3. Muscularis
4. Serosa/Adventitia
Mucosa - CORRECT ANSWER - inner most layer
3 components of mucosa - CORRECT ANSWER - 1. mucous epithelium
2. lamina propria
3. muscularis mucosae
mucous epithelium - CORRECT ANSWER - - stratified squamous in mouth, pharynx,
esophagus and anal canal
- simple columnar epithelium in the rest of the tract (secret and absorption)
lamina propria - CORRECT ANSWER - - loose connective tissue
- epithelium extends into the lamina propria to form glands and crypts
