Outline the stages of phagocytosis

Phagocytes recognise and bind pathogens through chemical attraction and receptors. Phagocytes (white blood cells) engulf the pathogen so it is contained within the cell in a phagosome. Lysosome containing lysozymes (enzymes) will fuse with phagosome. Enzymes will digest the pathogen and release soluble debris. Phagocyte will present the antigen on its surface to further activate the immune system

Related Biology A Level answers

All answers ▸

Describe the sequence of events which allows information to pass from one neurone to the next neurone across a cholinergic synapse. (6 marks)


Use your knowledge of the movement of water to explain why honey has antibacterial properties


Describe and explain the effect of an increase in muscular activity on the heart rate.


How can urine be used to detect pregnancy?