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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Point/Counterpoint

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Practice Quizzes

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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: Viruses
	A: are submicroscopic organisms that lack organelles and can only reproduce inside other cells
	B: are structurally very similar to eukaryotic cells
	C: are considered living organisms
	D: are not attacked by the immune system, which is why they are so dangerous

2: Bacteria
	A: are eukaryotes that lack nuclei
	B: are structurally identical to viruses
	C: are prokaryotes that lack distinct organelles
	D: cause disease

3: Which of the following is not part of the first line of defense against microorganisms?
	A: The skin
	B: The lining of the respiratory tract
	C: The lining of the intestinal tract
	D: The inflammatory response

4: During the inflammatory response
	A: mast cells release histamine, causing the blood vessels to constrict
	B: the release of prostaglandins at the site of the wound causes pain
	C: blood flow to the injured area is reduced to prevent blood loss
	D: all of the above
	E: none of the above

5: Pyrogens
	A: act on the temperature-regulating region of the hypothalamus, raising body temperature
	B: are chemicals that lower body temperature, thus protecting the body in case of an invasion by bacteria
	C: are one class of interferons
	D: increase iron availability, which is detrimental to bacteria

6: Substances that trigger an immune reaction are called
	A: interferons
	B: antimatter
	C: antibodies
	D: antigens

7: The major difference between B cells and T cells is
	A: B cells are lymphocytes and T cells are derived from monocytes
	B: B cells produce antibodies; T cells mount a direct attack on foreign cells
	C: B cells produce histamine; T cells produce antibodies
	D: none of the above

8: Antibody production
	A: is faster the first time a foreign substance is encountered
	B: occurs in the bone marrow
	C: occurs in T cells
	D: is faster the second time a foreign substance is encountered because of the formation of memory cells during the first reaction

9: Which of the following is not true regarding macrophages?
	A: They are derived from monocytes
	B: They are phagocytic cells located in body tissues
	C: They activate B cells after engulfing foreign substance such as bacteria
	D: All of the above
	E: None of the above

10: HIV attacks
	A: Helper T cells
	B: B cells
	C: T cells
	D: Monocytes

11: Which of the following is not a way to achieve active immunity?
	A: Exposure to a pathogenic bacterium while you are sleeping
	B: Injection of a vaccine
	C: The injection of antibodies into the bloodstream to protect against hepatitis
	D: The movement of antibodies across the placenta from the mother's bloodstream to her fetus' blood

12: Which of the following is true about allergies?
	A: They result in the production of a class of immunoglobulins, the IgE antibodies
	B: They are overreactions to environmental antigens such as food or pollen
	C: They result in the release of histamine from mast cells, which are responsible for many of the symptoms, including constriction of the bronchioles in the lungs
	D: All of the above
	E: None of the above

13: The term that describes a condition in which the immune system attacks the cells of the body is
	A: anaphylactic shock
	B: asthma
	C: autoimmune disease
	D: allergy

14: HIV
	A: is a DNA virus
	B: is an RNA virus that attacks all B cells
	C: is transmitted like the flu virus
	D: can remain inactive in the body for many years

15: Which of the following is not a condition of full blown AIDS?
	A: Formation of Kaposi's sarcomas
	B: Severe weight loss
	C: Uncontrollable infections caused by normally harmless bacteria
	D: High T4 (or helper T cell) concentration in the blood

16: AZT
	A: inhibits viral replication
	B: is a drug used to treat AIDS, but is only effective in the final stage
	C: is the only drug commercially available for the treatment of HIV infections
	D: None of the above

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