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An essential nutrient is one that


A) cannot be made by the organism.
B) can be found only in animal products.
C) is used for energy storage.
D) is required in large amounts.

E) C) and D)
F) A) and B)

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Cellulose is the most abundant carbohydrate on Earth.

A) True
B) False

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Cancer patients who receive radiation treatment or chemotherapy often slough off their most rapidly dividing body cells, such as those in the hair follicles and those lining the gastrointestinal tract. This results in much of the pain, fatigue, and other complications associated with the cancer treatment. Understandably, some loss of hair is expected when undergoing such procedures. Which of the following would you also expect to occur with cancer treatment?


A) Reduced nutrient absorption and subsequent weakness
B) High blood pressure
C) Constipation due to excessive water reabsorption
D) Elevated lipid and glucose levels in the blood
E) Excess mucus production in the airways

F) A) and B)
G) B) and C)

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If you chew on a piece of bread long enough, it will begin to taste sweet because


A) disaccharidases are forming glucose.
B) lipases are forming fatty acids.
C) amylase is breaking down starches into disaccharides.
D) maltase is breaking down maltose.
E) proteases are forming amino acids.

F) C) and D)
G) A) and C)

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Which of these animals uses collar cells to obtain food for intracellular digestion?


A) Sponges
B) Earthworms
C) Hydra
D) Humans
E) Protists

F) A) and D)
G) C) and D)

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A

Digestion in humans occurs in a gastrovascular cavity.

A) True
B) False

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False

digestion is the process by which food particles are exposed to enzymes that break them down into smaller subunits.

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A person has the highest energy expenditure at rest.


A) moderately physically active
B) very sedentary, overweight
C) moderately sedentary
D) very physically active, muscular

E) A) and C)
F) None of the above

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Which of the following plays a key role in the absorption and distribution of fats?


A) Microvilli and villi
B) Segmentation and peristalsis movements
C) Secretin and gastrin
D) Large intestine and rectum
E) Chylomicrons and lacteals

F) B) and C)
G) A) and B)

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The major function of the large intestine is to


A) make bile.
B) reabsorb water.
C) digest food.
D) neutralize chyme.
E) produce digestive enzymes.

F) B) and E)
G) All of the above

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Amylase is produced by the


A) salivary glands, small intestine, and pancreas.
B) small intestine only.
C) salivary glands only.
D) pancreas only.
E) salivary glands and pancreas.

F) C) and D)
G) A) and C)

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When you swallow, you set in motion a series of wavelike muscle contractions that are collectively called .

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Digested fats are packaged into , which are too big to enter blood capillaries and so have to diffuse into lacteals, where fats enter the lymph and are transported within the lymphatic system.


A) chyme
B) lipases
C) bile salts
D) micelles
E) chylomicrons

F) C) and E)
G) A) and D)

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You eat 25 potato chips, which contain 10 grams of carbohydrate (potato) and 10 grams of fat. This means that


A) about 40 Calories are from fat and 90 Calories are from carbohydrate.
B) all of the calories are from carbohydrate.
C) about half your calories are from fat and half from carbohydrate.
D) about 90 Calories are from fat and 40 Calories are from carbohydrate.
E) all of the calories are from fat.

F) A) and D)
G) A) and C)

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Which hormone stimulates the activity of gastric glands?


A) Secretin
B) Cholecystokinin
C) Gastrin
D) Pepsinogen

E) All of the above
F) A) and C)

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Bile is made by the .

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You need the mineral _ in your diet in order to carry oxygen efficiently in your red blood cells.

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Which of these enzymes catalyzes the breakdown of starch (a polysaccharide) ?


A) Amylase
B) Peptidase
C) Pepsin
D) Lipase
E) Bile

F) C) and E)
G) C) and D)

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A

Different species of animals have very different nutritional requirements and gastrointestinal tract (GIT) specializations, depending on their primary diets. For example, carnivorous animals have relatively short small intestines, fast gut passage rates, and high protein requirements, in accordance with the high- protein, easily digested prey they consume. Based on your knowledge of nutrition and digestion and on the example provided in this scenario, what do you conclude about ruminants, which eat low- protein, difficult- to- digest plant leaves?


A) They have normal nutritional requirements but extremely short GITs and fast gut passage rates to maximize the amount of food passing through the GIT.
B) They have reduced protein requirements, long GITs, and slow gut passage rates to extract as many nutrients as possible from their diet.
C) They have reduced protein requirements but GITs and gut passage rates similar to those of carnivores.
D) Their GITs and nutritional requirements are similar to those of carnivores, and they must also eat some animal prey to obtain enough dietary protein.

E) None of the above
F) All of the above

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Which vitamin plays a major role in blood clotting?


A) B12
B) B1 (thiamin)
C) K
D) D
E) A

F) D) and E)
G) A) and C)

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