What is the Immune System?

What is the primary role of the immune system in the human body?

• To regulate body temperature.

• To protect the body from sickness and disease.

• To control blood flow throughout the body.

• To help with digestion.

Which of the following are components of the immune system?

• Brain, heart, and lungs.

• Skin, white blood cells, and the lymph system.

• Bones, muscles, and nerves.

• Stomach, intestines, and liver.

What is the role of the skin as part of the immune system?

• It produces white blood cells.

• It acts as the first layer of defense against bacteria and germs.

• It helps transport nutrients throughout the body.

• It stores memory cells for past infections.

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

• Neutrophils

• Macrophages

• T-cells

• B-cells

What happens to lymph nodes when you have a sore throat?

• They shrink to their normal size.

• They become swollen.

• They stop working.

• They travel to other parts of the body.

What is true about all germs in our bodies?

• All germs are harmful and cause illness.

• Some germs help strengthen our immune system.

• Germs only attack the body when it's weak.

• The body has no way to fight off germs.

How do vaccines help protect the body from diseases?

• They introduce strong viruses to immediately fight off infections.

• They prevent any germs from entering the body.

• They inject a weak virus to train the immune system to produce antibodies.

• They replace the body's natural immune cells with stronger ones.

What happens in an autoimmune disease?

• The immune system attacks harmful germs too slowly.

• The body produces too many healthy cells.

• The immune system mistakenly attacks the body's own healthy cells.

• The body's immune system becomes completely inactive.