Understanding the Immune System

The video explains the immune system's crucial role in protecting the body from harmful microorganisms. It describes the components of the immune system, including tissues, cells, and organs, and details how leukocytes detect and respond to antigens. The video also covers the production and function of antibodies, the role of vaccines in enhancing immunity, and concludes with trivia about different types of immunity.

What is the primary function of the immune system?

• To produce energy

• To regulate body temperature

• To protect the body from harmful microorganisms

• To digest food

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

• Lymph nodes

• Bone marrow

• Heart

• White blood cells

What triggers the immune response when a foreign substance enters the body?

• Hormones

• Vitamins

• Antigens

• Antibodies

Which cells are responsible for destroying infected body cells?

• Platelets

• B cells

• Red blood cells

• T cells

What do B lymphocytes produce to combat antigens?

• Vitamins

• Enzymes

• Antibodies

• Hormones

Why is it difficult for viruses and bacteria to multiply in a warmer body?

• They need sunlight

• They prefer cold environments

• They require oxygen

• They thrive in acidic conditions

What are the two main groups of leukocytes?

• Red and white blood cells

• Macrophages and dendritic cells

• T cells and B cells

• Phagocytes and lymphocytes

How do vaccines help the immune system?

• By improving digestion

• By providing energy

• By helping fight enemy germs

• By strengthening bones

Which type of immunity is acquired through vaccines?

• Natural

• Passive

• Adaptive

• Innate

What happens to antibodies after they are produced by B-cells?

• They disappear

• They stay in the body

• They turn into antigens

• They become inactive