Immune System - Brainpop

The mucus in your nose and the acid in your stomach are both front-line defenses against pathogens. Which is another front-line defense?

• antibodies
• leukocytes
• T-cells
• skin

If you were looking for your body's leukocytes, where would you find them?

• glands
• bloodstream
• stomach
• lungs

What might happen if your immune system didn't recognize a germ that has invaded your body?

• germ would have time to multiply & make you sick
• WBCs will begin killing healthy cells instead
• antibodies will begin attacking each other
• body will stop producing WBCs

What is the main function of antibodies?

• remembering germs that have invaded your body in the past
• creating new WBCs
• binding themselves to invading antigens
• signaling your immune system that antigens have invaded your body

What might you find inside a vaccine?

• weakened pathogens
• brand new antibodies
• strong leukocytes
• harmful viruses

What is one important effect of your body's ability to remember certain pathogens? It prevents ______.

• bacteria from killing you
• you from transmitting diseases to other people
• pathogens from making you sick more than once
• your immune system from attacking healthy tissue

What is one major difference between viruses and bacteria?

• viruses can make you sick; bacteria can't
• bacteria can be treated with antibiotics; viruses can't
• viruses can be trapped by mucus; bacteria can't
• bacteria can cause infections; viruses can't

How does the HIV virus attack?

• it kills the antibodies in your body
• it prevents you from making new antibodies
• it prevents your body from remembering the diseases you have already had
• it attacks WBCs so your body can't fight infection

What is the best way to keep your immune system healthy?

• eat only organic foods
• maintain a healthy diet and get plenty of rest
• keep physical contact with other people to a minimum
• wear a surgical mask over your nose and mouth

Why isn't there a vaccine for the common cold?

• it's not really a virus
• it's caused by an extrememly tiny virus
• many different viruses cause cold symptoms
• cold vaccines trigger autoimmune responses