Non-Specific Body Defences Unit 3 Flashcards
What name is given to any organism that can cause disease ?
Pathogen
Name two things that could be classed as pathogens
Bacteria and Virus
How many lines of defence are employed by the body to protect itself from pathogens ?
3
Which lines of defence in the body are non-specific ?
The first 2 lines of defence
Which line of defence in the body is specific ?
The 3rd line of defence
Name the physical barrier that we all have to try and keep pathogens entering the body
Skin
Name the substance produced by the stomach to kill pathogens ?
Hydrochloric Acid
Name the substance produced by the epithelial cells in the lining of the trachea that traps microbes
Mucus
Name the hairs in the trachea that move mucus up to the top of the mouth for swallowing or spitting out
Cilia
What is the enzyme found in years and saliva that digests bacterial cell walls ?
Lysozyme
How do sweat glands in the skin kill microbes ?
The swear glands keeps the skin at too low a pH for microbes to thrive
What level of defence is the inflammatory response ?
2nd level
When is the inflammatory response used by the body ?
When it suffers a physical injury such as a cut or invasion by microorganisms
What called are activated in the connective tissues when the body suffers an injury ?
Mast cells
What do mast cells contain ?
Histamine
