Understanding the Immune System

The video explains the immune system's 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 threats. The video also covers the importance of vaccines in supporting the immune system and outlines the three types of immunity: innate, adaptive, and passive. The immune system's ability to remember past infections is highlighted, explaining why diseases like chickenpox usually don't reoccur.

What is the primary function of the immune system?

• To digest food

• To protect the body from harmful microorganisms

• To regulate body temperature

• To produce energy

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

• Lymph nodes

• White blood cells

• Bone marrow

• Liver

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

• Antibodies

• Antigens

• Hormones

• Vitamins

Which cells are responsible for destroying infected body cells?

• Platelets

• T cells

• B cells

• Red blood cells

What do B lymphocytes produce to combat antigens?

• Vitamins

• Hormones

• Antibodies

• Enzymes

Why is a high temperature beneficial during an immune response?

• It makes it harder for viruses to multiply

• It makes the body weaker

• It helps viruses multiply

• It has no effect

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 turn into antigens

• They become inactive

• They stay in the body

• They disappear

What are the three types of immunity?

• Innate, active, reactive

• Adaptive, passive, reactive

• Active, passive, reactive

• Innate, adaptive, passive