Introduction to the Digestive System - Video Tutorials & Practice Problems
Organs of the Digestive System
Introduction to the Digestive System Example 1
Four organs are listed below. During food’s path through the alimentary canal, the partially digested food passes through the lumen of each of these organs except:
Stomach.
Gallbladder.
Small intestine.
Large intestine.
True or False: if false, choose the answer that best corrects the statement.
While the accessory organs contribute important digestive enzymes and fluids, all digestions and absorption of nutrients takes place in the alimentary canal/GI tract.
True.
False, while most absorption occurs in the GI tract, the pancreas also absorbs vitamin B12.
False, both the organs of the GI tract and the accessory organs contribute to producing digestive fluids and absorbing nutrients.
False, water is absorbed in the GI tract, but nutrients are absorbed by the accessory organs.
Functions of the Digestive System
Introduction to the Digestive System Example 2
Which of the following are true for digestion:
I. Chemical digestion begins in the stomach.
II. Digestion involves breaking down food both physically and chemically.
III. Mechanical digestion increases the surface area of ingested food.
I & II.
I & III.
II & III.
I, II, & III.
Which is more essential to life and why: chemical digestion or mechanical digestion?
Mechanical digestion: mechanical digestion breaks down food molecules into their absorbable components.
Mechanical digestion: mechanical digestion increases the surface area of consumed food, so that it may be absorbed.
Chemical digestion: chemical digestion breaks down food molecules into their absorbable components.
Chemical digestion: chemical digestion increases the surface area of consumed food, so that it may be absorbed.
Of the following functions of the digestive system, which function is the responsibility of only one organ?
Absorption.
Propulsion.
Digestion.
Defecation.
Names for Food as it Moves
Introduction to the Digestive System Example 3
A bolus is found in which alimentary tract organ or organ(s)?
Small intestine.
Esophagus.
Stomach.
Both A and C are correct.
In which the following would you expect the most chemical digestion to occur?
A bolus.
Feces.
Chyme.
Chemical digestion would occur equally in all three.
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