What is the primary purpose of the immune system?

• To digest food and absorb nutrients

• To protect the body from harmful invaders and maintain internal balance

• To regulate body temperature

• To produce energy for the body

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How does the immune system distinguish self from non-self?

• By producing hormones

• By recognizing and defending against pathogens

• By generating electrical impulses

• By absorbing nutrients

What role do T-Cells or NK Cells play in the immune system?

• They produce insulin

• They remove damaged, abnormal, or cancerous cells

• They transport oxygen

• They store fat

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What is adaptive immunity?

• The ability to digest food

• The creation of memory of past infections for faster response

• The regulation of blood pressure

• The production of red blood cells

What is a pathogen?

• A molecule that triggers an immune response

• A disease-causing organism

• A usually harmless antigen that causes an exaggerated immune response

• A type of white blood cell

Which of the following best describes an antigen?

• A disease-causing organism

• A molecule that triggers an immune response

• A type of white blood cell

• A harmless substance that causes no immune response

What is an allergen?

• A type of bacteria

• A molecule that triggers an immune response

• A usually harmless antigen that causes an exaggerated immune response

• A disease-causing organism

What is the primary function of the lymphatic system?

• Support fluid balance, fat absorption, and immune defense

• Transport oxygen to the blood

• Regulate body temperature

• Produce red blood cells

Which of the following is NOT a component of the lymphatic system?

• Lymph nodes

• Spleen

• Heart

• Thymus

Which organ is responsible for the maturation of T-cells?

• Red bone marrow

• Thymus

• Spleen

• Lymph nodes

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