Human Bio Unit 1 - How our body's defence system works

Question 0

Antigen

Answer 0

Any substance capable of inducing a specific immune response and reacting with products of that response

Can be found on pathogens

Question 1

Pathogen

Answer 1

An agent that causes disease

Especially a living microorganism such as a bacterium or fungus

Question 2

First line of defense and why it’s effective

Answer 2

Skin

Outer layer is dead

Constantly being replaced

Question 3

Holes in the body and how they are protected

Answer 3

Eyes - tears

Nose - nasal hair, mucus

Mouth to stomach - stomach acid

Anus - secretement, flushes it out

Urethra - urine, flushes it out

Vagina - acid

Question 4

Inflammation

Answer 4

The bodies attempt at self protecting

Aim is to remove harmful stimuli

Question 5

How does inflammation happen?

Answer 5

Injury happens

Bacteria invade

Mast cells triggered

Mast cells releases histamine

Causes the blood vessel to swell and become leaky

Neutrophils attack and destroy the bacteria

Question 6

How does inflammation help fight bacteria?

Answer 6

The better blood supply raises the temperature

This slows the bacterias reproduction