12. Immunity Flashcards
2 lines of defence against invasion of pathogens that humans have?
Primary non-specific defence
Secondary specific defence
What is a primary non-specific defence?
Same response irrespective of which type of pathogen is attacking body
Same response irrespective of whether it is first or second attack
What is the aim of a primary non-specific defence?
prevent invasion by pathogen
How long can a secondary specific defence take to respond effectively?
Up to 14 days
What is produced in a secondary specific defence?
Memory cells
What does the product of memory cells result in during a secondary specific defence?
Prompt and higher response if invaded by same pathogen again.
What mode of protection is skin?
mechanical
What is skin?
a protective barrier covering the body
