Understanding the Immune System

The video explains the immune system as the body's defense mechanism against germs. It covers the components like skin, white blood cells, and the lymph system, detailing their roles in protecting the body. The video also discusses the importance of lymphocytes, the role of germs and vaccines in strengthening immunity, and the impact of autoimmune diseases. It concludes with tips for maintaining a healthy immune system.

What is the primary role of the immune system?

• To digest food

• To protect the body from germs

• To regulate body temperature

• To control muscle movements

Which part of the immune system acts as the first line of defense against germs?

• White blood cells

• Antibodies

• Lymph nodes

• Skin

Which type of white blood cell is responsible for producing antibodies?

• B cells

• Macrophages

• Neutrophils

• T cells

Which of the following is NOT a type of white blood cell?

• Neutrophils

• Macrophages

• Red blood cells

• Lymphocytes

What role do memory cells play in the immune system?

• They remember past infections to respond faster in the future

• They regulate body temperature

• They produce antibodies

• They transport nutrients

What is the function of the lymph system in the immune response?

• To produce red blood cells

• To transport lymphocytes and filter germs

• To digest nutrients

• To regulate hormones

What happens to lymph nodes when they are actively fighting an infection?

• They shrink

• They swell

• They change color

• They disappear

How do vaccines help in strengthening the immune system?

• By providing nutrients

• By introducing a weak virus to build immunity

• By increasing blood flow

• By reducing stress

What is an autoimmune disease?

• A disease caused by external bacteria

• A condition where the immune system attacks healthy cells

• A deficiency in white blood cells

• A viral infection

Which of the following is a way to keep your immune system strong?

• Staying indoors all the time

• Eating junk food

• Getting plenty of sleep

• Avoiding exercise