Blood Cells and Immunity

What is the primary function of the immune system?

• To digest food

• To transport oxygen

• To fight infections

• To produce hormones

During phagocytosis, what happens to the foreign particles?

• They are expelled out of the body.

• They are transported to the liver.

• They are engulfed and digested.

• They are neutralized by antibodies.

What is the main function of antibodies in the immune response?

• To produce white blood cells

• To carry oxygen to tissues

• To identify and deactivate foreign objects like bacteria and viruses

• To support the production of red blood cells

What are antigens?

• Cells that produce antibodies

• Substances that the immune system recognizes as foreign

• A type of white blood cell

• A type of red blood cell

What is the primary function of red blood cells?

• To fight infections

• To clot blood

• To carry oxygen from the lungs to the body's tissues

• To produce antibodies

How do white blood cells recognize foreign invaders?

• By the oxygen level in the blood

• By the shape of red blood cells

• By identifying specific antigens on the invaders

• By the temperature of the body

What role do antibodies play in the immune response?

• They engulf and digest pathogens.

• They increase the oxygen-carrying capacity of red blood cells.

• They mark pathogens for destruction by other immune cells.

• They convert antigens into nutrients for cells.

Which of the following cells are NOT directly involved in the immune response?

• Red blood cells

• B cells

• T cells

• Platelets

What is the significance of antigens in the immune system?

• They help in the production of red blood cells.

• They act as messengers between different types of white blood cells.

• They are recognized by the immune system as targets for an immune response.

• They supply nutrients to white blood cells.

Which of the following best describes the process of phagocytosis?

• The production of antibodies by B cells

• The engulfing and digestion of pathogens by phagocytes

• The transport of oxygen by red blood cells

• The identification of antigens by T cells