The first antibody produced during the primary immune response is the:
a. IgM. c. IgA.
b.IgG . d. IgE.
a
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Indicate whether the statement is true or false
Which of the following statements about Class A foam concentrates is MOST accurate?
A. Class A foam is used for structural fires, but is not suitable for wildland fires. B. Class A foam is used to prevent ignition of fires involving flammable and combustible liquids. C. Class A foam reduces the surface tension of water, allowing better water penetration into the fuel. D. Class A foam concentrate coats and protects application equipment; equipment should not be flushed after use.
Which of the following is used at the end of a word root to change the meaning of a word?
A) Prefix B) Suffix C) Combining form D) Word root
Which of the following is TRUE about sickle cell disease?
A) The spleen and kidneys are especially prone to sickling damage. B) Repeat sickle cell crises slowly destroy organs and tissues. C) Sickle cell crises cause microinfarcts in joints and organs. D) Sickling crices are triggered by conditions that affect cellular pH. E) All of the above are true. F) A, B, and D are true.