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Which of the following determines the acidity of a substance?


A) The concentration of hydroxide particles
B) The concentration of carbon particles
C) The concentration of oxygen particles
D) The concentration of hydrogen particles
E) The concentration of glucose particles

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Which of the following is the most acidic?


A) Vinegar
B) Orange juice
C) Gastric juice
D) Battery acid
E) Blood

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In cases of severe undernutrition, the small intestine will react by:


A) shrinking to a much smaller surface
B) expanding to a much larger surface
C) increasing intestinal muscle activity
D) increasing the amount of nutrients absorbed
E) increasing the secretion of digestive enzymes

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The blood exchanges oxygen and carbon dioxide in the:


A) heart
B) liver
C) digestive system
D) lungs
E) mouth

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Blood leaving the digestive system is routed directly to the _____.


A) liver
B) kidneys
C) gallbladder
D) heart
E) lungs

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The vast majority of fat digestion takes place in the:


A) mouth with lipases secreted in the saliva
B) stomach with proteases mixed with gastric juices
C) small intestine with lipases released by the pancreas
D) large intestine with lipases mixed with water
E) large intestine with microbial proteases

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The kidneys are waste- and _____-removal specialists.


A) fat
B) carbohydrate
C) water
D) blood
E) protein

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Describe what happens to the small intestine in cases of severe undernutrition.

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In cases of severe undernutrition with t...

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What is the function of the saliva secreted by the salivary glands?


A) It moistens and lubricates food.
B) It breaks down glucose into starch.
C) It helps maintain an alkaline environment in the mouth.
D) It splits protein fragments into free amino acids.
E) It helps absorb minerals from food.

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During the fight-or-flight reaction, the body reacts by:


A) temporarily shutting down metabolism
B) slowing down breathing to conserve oxygen
C) releasing stored glucose from the liver
D) speeding up the work of the digestive system
E) slowing the heart rate to conserve blood

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List three ways in which hormones affect nutrition.

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Hormones regulate the digestive system i...

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Which of the following food constituents is not digested in the stomach?


A) Sugar
B) Starch
C) Fat
D) Fiber
E) Protein

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Chewing food for an extended time after it has been mashed and moistened provides additional advantages to digestion.

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Explain why thiamin and folate deficiencies are an inevitable consequence of alcohol abuse and how they occur.

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Nutrient deficiencies are an inevitable ...

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Which strategy should be used by someone experiencing heartburn?


A) Drink plenty of liquids during meals.
B) Wear tight clothing.
C) Lie down after meals.
D) Eat smaller meals.
E) Put on weight.

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A person can eat when hunger is absent because:


A) the glands start supplying epinephrine to the brain
B) the conscious mind of the cortex can override the body's signals
C) the digestive tract sends messages to the hypothalamus
D) the stomach intensifies its contractions and creates hunger pangs
E) the hypothalamus signals the availability of food in the environment

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What is the function of the enzymes secreted from the small intestine and the pancreas?


A) They emulsify fats.
B) They help maintain an acidic pH level in the small intestine.
C) They split protein fragments into smaller fragments or free amino acids.
D) They maintain a neutral pH level in the digestive tract.
E) They inhibit starch digestion.

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The bones provide reserves of:


A) vitamins
B) calcium
C) glycogen
D) fat
E) both glycogen and fat

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Which of the following is a consequence of alcohol abuse?


A) Stomach cells undersecrete acid and histamine.
B) Cells of the eye's retina process retinol instead of ethanol.
C) The kidneys reduce the excretion of magnesium, calcium, potassium, and zinc.
D) The liver expels folate into the blood for excretion by the kidneys.
E) The body absorbs and stores excess thiamin.

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Hormones are secreted and released directly into the blood by organs known as _____.


A) nerves
B) ducts
C) glands
D) arteries
E) capillaries

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