unit c: human health
TRANSCRIPT
Topics We’ll Cover
○ What is disease? What kinds are there?
○ How does our body protect us from disease?
○ Who is most at-risk for disease?
○ Should forced vaccinations be a thing?
○ What happens when antibiotics are abused/used improperly?
○ How are genetic diseases passed from parent to child?
Disease
A disease is any condition that causes a disruption
in normal body functioning.
Diseases are caused by a variety of different
factors, including viruses, bacteria, fungi, the
environment, and genetics.
There are
countless
diseases… by
why can you
“catch” some
and not
others???
Types of DiseaseThere are two general types of diseases:
1) COMMUNICABLE
○ Diseases that are spread from
organism to organism (either by
direct or indirect contact)
○ Examples: malaria, measles, the
flu
2) NON-COMMUNICABLE
○ Medical conditions that are not
infectious (cannot be passed
from one organism to another)
○ Examples: heart disease,
cancer, asthma
Can you think of other examples?
Communicable
1. ____________________
2. ____________________
3. ____________________
Non-Communicable
1. ____________________
2. ____________________
3. ____________________
Note: communicable diseases are also called
________________________ diseases
1. Fungio Includes molds, yeasts, and mushrooms. o Some are parasites, and can live only on their “host”
organismso Examples: athlete’s foot, ringworm
Viruseso Did you know that viruses are not really living
things??? o Viruses enter body cells, hijack their organelles, and turn
the cell into a virus making-factory. The cell will eventually burst, releasing thousands of viruses to infect new cells.
o The virus on its own, however, can’t do anything without a host.
Cell before infection… …and after.
Not all bacteria are bad. Some are actually
required for healthy functioning
Escherichia coli bacteria
in our digestive tract
help aid in digestion.
But E. coli bacteria are
also responsible for food
poisoning… so why are
we all not sick?
Only if E. coli are introduced in an unnatural manner can they become harmful
Good Bacteria?
Bad Bacteria
(click to play)
http://www.phac-aspc.gc.ca/phn-
asp/2017/outbreak-ecoli-eng.php
Current Food Recalls in
Canada http://www.inspection.gc.ca/about-the-
cfia/newsroom/food-recall-
warnings/eng/1299076382077/129907649384
6
Flour Recall: April 2017
● All Robin Hood flour
products recalled due to
E.coli contamination
● One individual seriously ill
with E.coli poisoning after
consuming the flour
● Dozens of other cases being
investigated
Bad Bacteria
Meet the Plaque Coating Your Teeth!
(click to play)
Can We See Bacteria in Yogurt?
○ Some types of bacteria can ferment
milk, producing lactic acid in the
process. Yogurt is a product of
fermentation. It is acidic and stays fresh
longer than milk, and is also digested
more easily.
○ In this exercise you will prepare a
microscope slide of yogurt and
determine what shape of bacteria
yogurt contains