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How does the presentation of a virus antigen by a macrophage lead to antibody production against the antigen?

T helper cells recognise and bind to the antigen and become activated. The activated T helper cell stimulate B cells to form plasma cells that produce and release antibodies that are specific to the viral...

Answered by Prakruthi P. • Biology tutor

3132 Views

How do I write a good Psychology essay?

It goes without saying that a thorough knowledge of the subject is important. In order to be able to score all the points for the outline portion of the essay you must be able to describe and explain theo...

Answered by Daniel G. • Psychology tutor

3102 Views

'Ethical statements are simply expressions of emotion' Discuss

Introduction- Ethical statements are not simply expressions of emotion. Although the non-cognitive branch of meta-ethics emotivism claims ethical statements are only expressions of emotion due to no evide...

Answered by Charlotte B. • Religious Studies tutor

11397 Views

How does an action potential propagate?

a stimulus depolarises the membrane potential above the threshold level e.g. -40 mvthis causes voltage gated Na+ ion channels to open- resulting in an influx of Na+ into the cellthis depolarises the membr...

Answered by Syed A. • Biology tutor

2229 Views

Describe the stages of phagocytosis (4 marks)

the phagocyte recognises the antigen on the pathogen surface as foreignThe phagocyte cytoplasm moves around the pathogen, and the membranes fuse, forming a phagosomeLysosomes containing lysozymes fuse wit...

Answered by Aislinn M. • Biology tutor

9516 Views