Describe the process of phagocytosis and how antigen presentation leads to antibody production (9 marks)

White cell (macrophage/neutrophil) detects bacteria antigen by binding to cell surface receptorsWhite cell engulfs bacteria (this is endocytosis), bacteria is held in a phagosome Lysosomes enter phagosome and digest the bacteria via enzymesBreakdown products of bacteria (ANTIGEN) are presented to the cell membrane via exocytosis (movement out of cell)WBC is now an antigen presenting cell.T Helper Cell binds to antigen presenting cell via receptors and is activatedActivated T Helper Cell binds to a specific B cell via CD40 receptorsThe B cell clones and forms plasma cellsThese release antibodies

CR
Answered by Caine R. Biology tutor

2847 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

How can I find the frequency of genotype Bb in a population given that the frequency of BB is 0.49? (Where B = dominant allele, b = recessive allele on the same gene).


How do expiration and inspiration occur by the action of the lungs?


What is the difference between mitosis and meiosis?


What is DNA?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning