Quiz


1.	Your immune system is primed to recognize and fight off which of these?
	A. Bacteria
	B. Pollen
	C. Transplanted organ
	D. All of the above

2.	One type of immune system cell is the B-cell, or B-lymphocyte. When it meets an antigen, what happens?
	A. It destroys the invader
	B. It changes into another type of cell
	C. It produces histamine
	D. None of the above

3.	Antibodies are divided into how many classes, which describe their chemical structure and thus their function?
	A. Four
	B. Five
	C. Six
	D. Ten

4.	Several organs in the body are also part of the immune system. Which of these organs is on that list?
	A. Liver
	B. Tonsils
	C. Spleen
	D. All of the above

5.	T-cells, or T-lymphocytes, are another type of immune cell. They develop in the bone marrow, but mature elsewhere in the body. Where does this occur?
	A. Tonsils
	B. Thymus
	C. Thyroid
	D. Tendons

6.	NK (natural killer) cells are critical against which type of invader?
	A. Bacteria
	B. Viruses
	C. Parasites
	D. All of the above

7.	Phagocytes are a type of immune cell that does what?
	A. Produces other immune cells
	B. Injects chemicals into invaders to kill them
	C. Engulfs and kills invaders
	D. None of the above

8.	A person with a malfunctioning immune system has which of these signs?
	A. Recurrent infections
	B. More severe infections
	C. More complications after an infection
	D. All of the above