21.1 The Lymphatic System

1			There are multiple afferent lymphatic vessels and only a single efferent vessel in order to
			A)	slow the flow of lymph for maximal immune activity.
			B)	increase the amount of lymph coming into the node.
			C)	regulate the amount of lymph leaving the cell.
			D)	None of the above.
2			These structures filter lymph fluid that is carried in the lymphatic vessels.
			A)	tonsils
			B)	Peyer's patches
			C)	Hassall corpuscles of the thymus
			D)	lymph nodes
3			Which of the following structures is enclosed within a fibrous capsule?
			A)	Peyer's patch
			B)	lymph node
			C)	lymphatic nodule
			D)	tonsil

21.2 Nonspecific Response

4			Which of the following cells does not have phagocytic capability?
			A)	eosinophils
			B)	basophils
			C)	neutrophils
			D)	histocytes
5			All of the following are signs of an inflammatory response except ____.
			A)	heat
			B)	odor
			C)	swelling
			D)	pain
6			Pyrogens, secreted by neutrophils and macrophages, function to
			A)	lyse bacterial cells.
			B)	promote reproduction of bacteria and viruses.
			C)	temporarily lower the set point of body temperature.
			D)	temporarily raise the set point of body temperature.

21.4 Cellular Immunity

7			Which of the following act as "identification tags" which label an individual's cells as self cells?
			A)	MHC proteins
			B)	haptens
			C)	epitopes
			D)	interleukins

21.5 Humoral Immunity

8			There are five classes of antibodies. Which one can cross the placenta to provide immunological protection for the newborn?
			A)	IgD
			B)	IgE
			C)	IgG
			D)	IgM

21.6 Immune System Disorders

9			The human immunodeficiency virus can be acquired by all of the following means except
			A)	sexual intercourse.
			B)	blood.
			C)	childbirth and breastfeeding.
			D)	donating blood.
10			HIV attaches to the CD-4 membrane protein of these cells.
			A)	memory T
			B)	natural killers
			C)	suppressor T
			D)	helper T