Immune System Functions and Responses

Mrs. Alexander explains the immune system's role in defending against infections. The lesson covers non-specific defenses like skin and mucus, and specific defenses involving T and B cells. It highlights the difference between innate and adaptive immunity, and illustrates the immune response to a cold virus through a step-by-step process.

What is the primary role of the immune system?

• To produce energy

• To digest food

• To regulate body temperature

• To defend against infections

Which of the following is NOT a first line of defense?

• Skin

• Inflammation

• Mucus

• Nose hair

What is the function of phagocytes in the immune system?

• To produce antibodies

• To engulf and destroy pathogens

• To transport oxygen

• To regulate blood pressure

How do T cells and B cells differ in their roles?

• T cells are the workers, B cells are the bosses

• T cells are part of the first line of defense, B cells are not

• T cells produce antibodies, B cells engulf pathogens

• T cells coordinate the response, B cells produce antibodies

What is the main characteristic of adaptive immunity?

• It is present from birth

• It provides immediate response

• It adapts and learns from exposure

• It is non-specific

Which cells are responsible for remembering past infections?

• Red blood cells

• Platelets

• Memory T and B cells

• Phagocytes

What is the first step in the immune response to a cold virus?

• Remember the invaders

• Call for help

• Identify the invaders

• Destroy the invaders

How do antibodies function in the immune response?

• They mark pathogens for destruction

• They regulate body temperature

• They engulf pathogens

• They produce energy

What role do helper T cells play in the immune response?

• They regulate blood pressure

• They engulf pathogens

• They produce antibodies

• They activate other immune cells

What is the purpose of memory cells in the immune system?

• To transport oxygen

• To regulate body temperature

• To produce energy

• To remember past infections