Daniel D. Chiras: Human Biology, Fifth Edition: Practice Quizzes

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Title Text: Daniel D. Chiras: Human Biology, Fifth Edition

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Tools For Learning: Practice Quizzes

Please read each question and select your answer from the choices provided. You must complete all of the questions in order to view your results. At the end of each exam, you have the option to e-mail your results to your instructor.

1: Which of the following is not a macronutrient?
	A: Vitamin C
	B: Protein
	C: Carbohydrates
	D: Fats

2: Water is an important component of the diet because
	A: it helps stabilize body temperature
	B: it is required for many chemical reactions
	C: it helps maintain normal concentrations of wastes and nutrients in the body
	D: a and b
	E: All of the above

3: Basic body functions, including digestion, metabolism, and the transport of molecules across plasma membranes, requires approximately ___ of the total energy we consume when sedentary.
	A: 15%
	B: 25%
	C: 50%
	D: 70%

4: The general term for foods required in minute quantities is
	A: macronutrients
	B: micronutrients
	C: vitamins
	D: coenzyme

5: Dietary fiber
	A: is derived from starch in meat sources
	B: is highly digestible polysaccharide found in fruits and vegetables
	C: is a term that is used to describe two types of nondigestible fibers that have been shown to reduce colon cancer and cholesterol levels
	D: None of the above

6: Which of the following reduces cholesterol levels in one's bloodstream?
	A: A juicy steak
	B: Water-insoluble fibers
	C: Water-soluble fibers found in fruits, vegetables, and some grains
	D: Fat-soluble vitamins

7: Which of the following is not a function of dietary lipids?
	A: Some forms serve as a precursor to steroids that are synthesized in the body
	B: They help supply fatty deposits that cushion internal organs
	C: They provide three quarters of our energy demand during rest
	D: Our diets should contain no more than about 30% fat

8: Which of the following is not true?
	A: Essential amino acids must be provided in the diet
	B: Essential amino acids are synthesized in the cells of the body
	C: Protein should constitute about 20% of our caloric intake
	D: Proteins are not a source of energy under normal conditions

9: Vitamins
	A: are harmless in large quantities
	B: are required in small quantity and therefore are of little importance
	C: are fat-soluble molecules present in the food we eat
	D: are a form of micronutrient

10: Saliva
	A: contains enzymes that digest most of the food we chew
	B: contains enzymes and antibodies that kill some of the bacteria in food
	C: is produced by large glands located in the neck
	D: is produced in excess at night when we sleep to help keep our mouths clean and reduce tooth decay

11: Which of the following is not correct?
	A: Food leaves the oral cavity and enters the trachea, then travels to the stomach
	B: The taste buds detect four basic flavors: sweet, sour, salty, and bitter
	C: The epiglottis keeps food from entering the trachea during swallowing
	D: Peristaltic contractions push food in the stomach into the small intestine

12: Most digestion occurs in the
	A: stomach
	B: small intestine
	C: large intestine
	D: gall bladder

13: The pancreas
	A: produces digestive enzymes that are secreted into the large intestine
	B: produces insulin and glucagon, two hormones that help regulate blood levels of calcium
	C: produces hydrochloric acid which helps coagulate protein in the stomach
	D: b and c
	E: None of the above

14: Bile salts are
	A: produced by the gallbladder and released into the small intestine
	B: proteins that aid in the digestion of fat
	C: digestion
	D: b and c
	E: None of the above

15: Which of the following does not increase surface area for absorption in the small intestine?
	A: Microvilli
	B: Villi
	C: Cilia
	D: None of the above

16: What is the main function of the large intestine?
	A: Absorb excess water, sodium, and potassium in the fecal matter
	B: Digest proteins
	C: Emulsify fats
	D: None of the above

17: Vitamins K, B-12, and thiamine are
	A: fat-soluble vitamins
	B: supplied solely by dietary sources
	C: produced by bacteria in the large intestine and absorbed into the bloodstream
	D: None of the above

18: The appendix
	A: attaches to the large intestine and plays an important role in digestion
	B: attaches to the small intestine and can become swollen
	C: is a vestigial organ that is found in the lower left quadrant of the abdominal cavity
	D: is an endocrine gland in the abdominal cavity that produces insulin

19: Which of the following is not true?
	A: Defecation in adults does not occur unless the external anal sphincter is voluntarily relaxed
	B: In babies, fecal matter accumulates in the rectum stimulating nerve impulses that cause the internal and external anal sphincters to relax, causing defecation
	C: Defecation is usually assisted by voluntary contractions of the abdominal musculature
	D: all of the above
	E: None of the above

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