Review the animation and answer the questions that follow to test your understanding.

1			In the beginning of the complement fixation test
			A)	a patient's serum is heated to destroy complement and a measured amount of complement and antigen is added
			B)	a patient's serum is heated to destroy complement and a measured amount of complement and antibody is added
			C)	a patient's serum is heated to destroy antibodies and a measured amount of complement and antibody is added
			D)	the amount of complement in the patient's blood is measured as an indicator for the presence of infection
2			In the complement fixation test
			A)	red blood cells lyse if the patient has antigen being tested for
			B)	red blood cells lyse if the patient has antibody being tested for
			C)	red blood cells settle to the bottom if the patient has antibody being tested for
			D)	red blood cells settle to the bottom if the patient has antigen being tested for
3			Which is true?
			A)	a patient positive for the disease will show an increase in complement in his blood and thus give a positive test
			B)	a patient positive for the disease will show an decrease in complement in his blood and thus give a positive test
			C)	all patients have equal amounts of complement in their serum
			D)	patients differ in the amount of complement naturally found in their serum
4			The complement fixation test looks for the presence of specific antigens in the patient's blood.
			A)	True
			B)	False
5			Lysis of sheep red blood cells indicates the patient has the antibody being tested for.
			A)	True
			B)	False