The Mighty Immune System and Its Defenses

The video explains the immune system's role in protecting the body from germs and diseases. It describes the components of the immune system, including skin, white blood cells, and the lymph system. The video details the functions of different white blood cells, such as neutrophils, macrophages, and lymphocytes, and explains how T cells and B cells work to fight infections. It also discusses the importance of germs in strengthening the immune system and how vaccines work. The video highlights the variability in immune systems and the occurrence of autoimmune diseases. Finally, it provides tips for maintaining a healthy immune system through lifestyle choices.

What is the primary role of the immune system?

• To regulate body temperature

• To protect the body from germs

• To digest food

• To provide energy

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

• Liver

• Heart

• Skin

• Lungs

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

• Macrophages

• Neutrophils

• T cells

• B cells

What is the function of helper T cells?

• To produce antibodies

• To carry oxygen

• To destroy infected cells

• To instruct B cells to make antibodies

What do lymph nodes do when you have a sore throat?

• They release hormones

• They shrink

• They swell

• They produce antibodies

How do vaccines help the immune system?

• By providing nutrients

• By introducing a weak virus

• By increasing blood flow

• By reducing stress

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

• To digest food

• To transport oxygen

• To remember past infections

• To produce hormones

What is an autoimmune disease?

• A disease caused by bacteria

• A type of cancer

• A condition where the immune system attacks healthy cells

• A viral infection

Which of the following is a way to maintain a healthy immune system?

• Staying indoors all the time

• Avoiding exercise

• Getting plenty of sleep

• Eating junk food

What happens when the immune system attacks a harmless substance?

• It causes an allergic reaction

• It strengthens the immune system

• It produces more red blood cells

• It increases metabolism