defence system Word Scramble
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Question | Answer |
What is pathogen? | Organism that cause diseases |
What is immunity? | The ability to resist infection |
What is general system? | Is non-specific. This means that it acts against all pathogens. |
What is specific defence system? | Is also called the immune system. It attacks particular(or specific) pathogens |
First line of general defence | Skin,Clotting,Lysozyme,Sebaceous Glands, Mucous, Cilia, Acid and Beneficial Bacteria |
S: Physical barriesr | SKIN |
C:The skin is broken, blood ... prevents the entry of further pathogens | CLOTTHING |
L: This is an enzyme found in sweat, tears and saliva. It attacks and dissolves the cell walls of many bacteria | LYSOZYMES |
S.G:Produce chemicals that kill bacteria | SEBACEOUS GLANDS |
C:Theses beat and create current, which moves mucous back up the respiratory system so that it can be swallowed into stomach | CILIA |
A:Hydrochloric... in the stomach kills many pathogens | ACID |
B.B: In the vagina produce lactic acid. This acid prevent the growth of pathogens | BENEFICIAL BACTERIA |
Second line of general defence | Destruction of pathogens by white blood cells, production proteins kill or prevent pathogens from reproducing |
Types second line of general defence | White blood cells Defence proteins Inflamation |
White blood cells | Micro-organisms they realease number of chemicals. Destroy any bacteria, viruses or other micro-organisms that they meet |
Types of white blood cells | Phagocytes and magrophages |
Phagocytes | Sunrround and ingest pathogens |
Magrophages | Phagocytes very large, move around the body in body fluids and act as scavengers for pathogens |
Defence proteins | 20 proteins found in the blood plasma. The proteins in complement are activated by infection, and they destroy viruses and other pathogens. Multiplication and help to limit |
Specific defence system | Attacks particular(or specific) pathogens |
Types of specific defence system | Lymphocytes and monocytes Antigens and antibodies Active immunity |
Monocytes | Recognise foreign molecules, digest a pathogen, antigens. These antigens then stimulate the production of antibodies |
Created by:
ppsaura
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