Mader's Concepts in Biology, First Edition

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Sylvia S. Mader

Chapter 31

Question 1

Which of the following is not associated with the digestive system of herbivores?

A. grinding teeth

B. a complete digestive system

C. broad incisors

D. sharp canines

E. a long gastrointestinal tract

Question 2

The correct function of the human stomach is:A. to produce highly basic fluids to kill most

bacteriaB. to begin the absorption of most small food

moleculesC. storage of food and mixing with digestive

fluids to begin chemical digestionD. promote bacterial fermentationE. primary site for water absorption

Question 3

Most nutrients are absorbed by the stomach.

A. true

B. false

Question 4

If you were studying the phase of the digestion process which can be broken down further into mechanical and chemical subdivisions, you would be studying which of the following?

A. elimination

B. ingestion

C. defecation

D. absorption

E. digestion

Question 5

When nutrients are taken into the body, often into the bloodstream, it is referred to as:

A. defecation

B. absorption

C. elimination

D. ingestion

E. digestion

Question 6

A biologist is studying organisms which sift small food particles from the water. Based on this information you would conclude that he or she is studying which of the following?

A. filter feedersB. fluid feedersC. bulk feedersD. substrate feedersE. parasites

Question 7

Organisms which are parasites are described as ____________ feeders.

A. filter

B. suspension

C. fluid

D. bulk

E. substrate

Question 8

If an organism has a gut with a single opening for food to enter and for waste to exit, they are said to have a(n) ____________ digestive tract.

A. typhlosoleB. completeC. lactealD. incompleteE. dysmorphic

Question 9

Which of the following organisms would not have a complete digestive tract?

A. birds

B. planarians

C. herbivores

D. carnivores

E. earthworms

Question 10

If you were examining an organism that has a crop which serves as a storage area for food you would be studying which of the following?

A. a flatwormB. a cowC. a rabbitD. a foxE. a bird

Question 11

Which of the following is a modification that mammalian herbivores, such as rabbits, have evolved to digest food?

A. they have a 4-chambered stomach

B. they have a 2-chambered stomach

C. they have a very large cecum

D. they have a very small cecum

E. they have a multi-chambered cecum

Question 12

What is the role of HCl in the stomach?

A. it is a symptom of a digestive disorder

B. only to cause stomach ulcers

C. digestive enzyme to hydrolyze fats

D. aids in the digestion of starch

E. activates digestive enzyme pepsin

Question 13

A biologist is studying the cause of ulcers in humans. After much research he has determined that they are primarily caused by:

A. too much alcoholB. eating fatty foodsC. not drinking enough waterD. a bacteria found in the stomachE. eating spicy foods

Question 14

If you were studying the portion of the small intestines which receives food, bile, and pancreatic juices, you would be studying which of the following structures?

A. the appendixB. the cecumC. the duodenumD. the transverse intestineE. the ascending intestine

Question 15

Which of the following would not be associated with the human mouth?

A. the hard and soft palate

B. the uvula

C. chemical and mechanical digestion

D. microvilli

E. teeth

Question 16

The main function of the esophagus is to:A. digest proteinsB. digest carbohydratesC. transport food from the small intestine to the

large intestineD. transport food from the mouth to the

stomachE. transport food from the stomach to the small

intestine

Question 17

Food is prevented from entering the trachea by the:

A. pharynx

B. larynx

C. epiglottis

D. glottis

E. sphincter muscle

Question 18

If you were studying the structure which is shared by the digestive system and the respiratory system you would be studying which of the following?

A. the esophagusB. the pharynxC. the glottisD. the epiglottisE. the trachea

Question 19

Muscles that encircle tubes and act as valves are called:

A. constrictors

B. dilators

C. sphincters

D. lacteals

E. mucosa

Question 20

A biologist is studying the rhythmic muscular contractions which push food along the digestive tract. Based on this information you would conclude that he or she is studying which of the following?

A. peristalsis

B. reflux

C. dysmorphia

D. swallowing

E. ingestion

Answer Key – Chapter 311. D2. C3. B4. E5. B6. A7. C8. D9. B10. E

11. C12. E13. D14. C15. D16. D17. C18. B19. C20. A