Which Statement Is Correct for Active Immunity

question 102

Multiple Choice

Which statement is correct for active immunity?

• A) It is self-generated upon exposure to antigen.
• B) It can be produced only as a result of a person actually having the disease.
• C) It involves administration of preformed antibodies.
• D) It is acquired in the newborn as a result of the transfer of antibodies across the placenta during intrauterine development.

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Definitions:

Leukocytes

White blood cells that are part of the immune system, responsible for defending the body against infectious disease and foreign materials.

Erythrocytes

Red blood cells that transport oxygen from the lungs to tissues throughout the body and return carbon dioxide for exhalation.

Formed Elements

Cells and cell fragments in blood, including red blood cells, white blood cells, and platelets.

Plasma

The liquid component of blood that carries cells and proteins throughout the body.