Immunity review

What is the primary function of your immune system?

• to create organelles

• to protect your body from pathogens

• to aid in blood circulation

• to protect your bones and muscles

First line mechanical defenses include

• skin-external barriers

• hair & cilia

• mucus

• internal membranes

• all of the above

Match the following type of defense to its example:

• flora of beneficial bacteria

• Chemical barrier

• skin

• Mechanical barrier

• enzymes

• Microbiological barrier

Select 3 ways that your digestive system works to protect you from pathogens that have entered your body on food?

• by using stomach acids to neutralize the pathogen

• causing you to vomit

• causing you to have diarrhea

• causing you to burp

Which part of the body where all blood cells are made?

Bacteria can harm your body and cause disease by...

• destroying cells and capturing toxins

• damaging tissue and releasing toxins

• damaging organs and ingesting cells

• causing fungus and viruses to grow

Most bacterial diseases can be treated with _______________.

• antibiotics

• carcinogens

• pathogens

• microbes

Bacteria are smaller than viruses.

• TRUE

• FALSE

Answer explanation

Bacteria are single-celled organisms that range in size from 0.2 to 10 micrometers in diameter. Viruses, on the other hand, are much smaller, ranging from 20 to 300 nanometers in diameter. This means that viruses are typically around 100 times smaller than bacteria.

What type of disease pattern spreads rapidly over countries and continents?

• Outbreak

• Pandemic

• Epidemic

• Endemic

A living cell that a virus infects is called a ________ cell.

• mast

• host

• cast

• partner