Agents of Disease

Infectious diseases are caused by:

• poor nutrition

• lack of exercise

• pathogens (germs)

• genetics

Which of the following are infectious diseases? Select all answers that are correct.

• athlete's foot caused by a fungus

• cardiovascular disease caused by an unhealthy lifestyle

• AIDS caused by Human Immunodeficiency Virus

• skin cancer caused by exposure to UV radiation

The "germ theory" has led to: (Select all correct answers.)

• sterile medical techniques

• less water filtration

• decreased personal hygiene

• More cooked and refrigerated food

All of the non-pathogenic (beneficial) bacteria, fungi, and viruses that live in and on your body are known as your:

• vectors

• microbiome

• fomites

• germs

Which of the following are beneficial effects of non-pathogenic bacteria living in and on your body? Choose all correct answers.

• They produce vitamins that are essential to your body.

• They can get out of control and become pathogenic.

• They keep pathogenic bacteria from invading your body.

• They help you break down food into nutrients.

An animal, such as a tick or mosquito, that carries a germ but doesn't cause the disease itself, is called a:

• fomite

• vector

• pathogen

• prion

Why is the human body an ideal place for microorganisms to live? Choose all correct answers.

• There is a relatively constant temperature.

• There is not a lot of water in the human body.

• There are plenty of nutrients to feed on.

• The human body offers very little protection from the outside environment.

How do pathogens (germs) interfere with our homeostasis? Choose all correct answers.

• They physically break down cells and tissues.

• They release harmful chemicals called toxins.

• They feed off of the nutrients in our bodies, taking them away from us.

• They make vitamins for us.

Tags

NGSS.MS-LS2-4

An object or surface that pathogens (germs) can live on and be transferred to people is called a:

• vector

• microbe

• fomite

• prion

Which of the following are categories of pathogens? Choose all correct answers.

• bacteria

• viruses

• protists

• fungi

• parasitic worms

Tags

NGSS.MS-LS2-4