Human Defence Systems (AQA GCSE Biology Combined Science): Flashcards

Prevents pathogens from entering the body

Physical barrier & antimicrobial secretions

Good microorganisms competing with bad ones for space & nutrients

Hair-like structures that beat to waft mucus upwards for swallowing

Produces hydrochloric acid to kill pathogens

Engulfing and consuming pathogens

Structure on pathogen surface that antibodies bind to

Cause pathogens to clump together, making them easier for white blood cells to find

Faster antibody production; no symptoms when infected again

Neutralise toxins by binding to them