AP Biology (Mader), 11th Edition

Chapter 34: Digestive Systems and Nutrition

Post-Test

1
Digestion contributes to homeostasis by _____.
A)producing hormones, which regulate blood chemistry
B)filtering out nitrogenous waste
C)providing the body with nutrients needed to sustain cells
D)producing red blood cells, which transport oxygen
2
Planarians _____.
A)rely on a circulatory system to distribute nutrient molecules
B)have an incomplete digestive tract
C)have a digestive system with many specialized parts
D)have a mouth and an anus
3
In earthworms, food is crushed and then ground up by sand in the:
A)Pharynx
B)Gizzard
C)Stomach
D)Gastrovascular cavity
4
All of the following are filter feeders EXCEPT:
A)Baleen whales
B)Clams
C)Tubeworms
D)Squid
5
Organisms that feed only on plants are referred to as _____.
A)herbivores
B)omnivores
C)carnivores
6
The body wall of a tapeworm has millions of fingerlike projections that _____.
A)increase surface area for absorption of nutrients
B)cling to the host's intestinal wall
C)secrete digestive enzymes
D)trap the tapeworm's prey
7
Microorganisms in the _____ of cows and deer begin the digestion of cellulose in partially chewed grasses.
A)mouth
B)rumen
C)intestine
D)gizzard
8
What lipoprotein delivers cholesterol to the arterial walls?
A)LDL (low-density lipoproteins)
B)triglycerides
C)HDL (high-density lipoproteins)
9
In humans, food is ingested through the mouth and makes its way to the stomach via the _____.
A)trachea
B)aorta
C)esophagus
D)small intestine
10
Which of the following 'digestive enzyme – enzymatic action' pairs is mismatched?
A)Trypsin – digests carbohydrates
B)Salivary amylase – digests starch
C)Lipase – digests fat
D)Peptidase – digests peptides
11
The _____ prevents food from entering the trachea.
A)epiglottis
B)uvula
C)lower esophageal sphincter
D)diaphragm
12
Chyme is the _____.
A)thick, soupy stomach contents
B)mixture of chewed food and saliva
C)secretions of pancreas
D)undigested food which is eliminated
13
Secretions from the pancreas and liver enter the _____.
A)stomach
B)duodenum
C)large intestine
14
The large intestine _____.
A)produces digestive enzymes
B)absorbs water, salts and some vitamins
C)is much longer than the small intestine
D)removes iron and vitamins from the blood
15
All of the following statements about feces is true EXCEPT:
A)Feces is about 75% water and 25% solid matter.
B)Feces contains mucus, intestinal bacteria and undigested plant material.
C)Feces is stored in the small intestines until elimination.
D)Feces leaves the body through the anus.
16
A diet high in _______ may lead to water retention and hypertension.
A)iodine
B)sodium
C)iron
D)zinc
17
Research has shown that an increase in obesity is linked to all of the following EXCEPT:
A)consuming more calories.
B)an increase in the number of hours one sleeps.
C)changes in hormones levels that control appetite and metabolism.
D)a decrease in physical activity.
18
If this structure becomes infected and bursts, it can lead to a serious, generalized infection of the abdominal lining called peritonitis.
A)Appendix
B)Gallbladder
C)Cecum
D)Pancreas
19
All of the following are functions of the liver EXCEPT:
A)Stores glucose as glycogen
B)Stores excess bile and releases it into the duodenum when needed
C)Produces bile
D)Removes toxic substances and metabolizes them
20
Night blindness is prevented by adequate amounts of _____ in the diet.
A)vitamin A
B)vitamin C
C)vitamin K
D)vitamin D
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