Understanding Diseases and Homeostasis

What is an infectious disease caused by?

• A lack of vitamins or minerals

• Problems with an organ in the body

• Microorganisms like bacteria or viruses

• Genes passed down from parents

Which disease is caused by not eating enough of certain nutrients?

• Hereditary disease

• Deficiency disease

• Physiological disease

• Infectious disease

What is a hereditary disease?

• A disease caused by harmful microorganisms

• A disease passed down through DNA from parents

• A disease caused by an organ not working properly

• A disease caused by poor nutrition

What does the term “prevalent” mean when talking about diseases?

• A disease that causes serious symptoms

• A disease that is rare in a population

• A disease that occurs frequently

• A disease that has been cured

What is an example of a physiological disease?

• A disease caused by bacteria

• A disease caused by the heart or liver not working properly

• A disease caused by missing vitamins in a diet

• A disease passed down from parents

Why have some bacterial diseases become less common in the last 100 years?

• Scientists have fixed the damaged genes that cause bacteria.

• Public health measures, like handwashing, have reduced bacterial infections.

• People now eat foods with fewer bacteria.

• Diseases caused by bacteria no longer exist.

How does the circulatory system help the digestive system?

• It directly breaks down food.

• It helps transport nutrients from food to the rest of the body.

• It controls the production of digestive enzymes.

• It shares the same organs as the digestive system.

If homeostasis fails, what might happen?

• The body will maintain balance.

• Organs will stop working properly, causing health problems.

• The body will get stronger to adjust.

• The immune system will become inactive.

What does feedback do in the body?

• It prevents diseases from forming.

• It helps maintain balance by adjusting body functions.

• It causes disease symptoms.

• It keeps the body from producing enzymes.

Which of these is an example of an infectious disease?

• Diabetes

• Iron deficiency anemia

• Influenza (flu)

• Tay-Sachs