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Human immune system
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Vaccination: An injection of a weakened strain of an infectious microbe (pathogen) that causes the body to undergo active immunity (produce antibodies).

Passive Immunity

This is immunity where antibodies are given to a person from the blood of another person or animal.

This immunity only lasts for a short period of time.

ex: Breastfeeding mothers pass antibodies to their children through the milk.

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Autoimmune Disease

Autoimmune Disease

Autoimmune diseases are diseases where the immune system begins to attack itself.

Ex:

Rheumatoid Arthritis crippling disease of the joints.

Lupus disease of blood and organs.

Multiple Sclerosis disease of nervous system

Cause(s): unknown

Cures/Treatments: No known cures. Usually treated with drugs.

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Allergies

Allergies

Allergy

- An exaggerated response by the immune system to an allergen.

Allergen: a normally harmless substance that causes an allergic reaction.

ex: dust, pollen, mould, food, insect stings

Types of Allergic reactions

There are two types of allergic reactions.

a. Immediate occurs within seconds and normally lasts for about 30 mins.

b. Delayed takes longer to react and can last for a much longer time.

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What happens during an allergic reaction?

What happens during an allergic reaction?

During an allergic reaction antibodies cause histamines to be released from certain cells.

Histamines cause:

a. Swelling of tissues

b. Release of fluids (runny noses and eyes)

c. muscle spasms (some cases)

Anaphylaxis or anaphylactic shock:

This is the sudden and severe allergic reaction to a substance that can cause death.

Treatments for Allergies

Avoidance of material especially food.

Epinephrine epi pen

Antihistamines -- benadryl

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Homework

Homework

Complete STSE What is Cancer? (Scriptum)

Complete Qs 1,2,4,6,7 on page 386 MHR

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