How does phagocytosis work?
The phagocyte will be attracted to a pathogen and move to it via chemotaxis. The phagocyte then engulfs the pathogen. Once the pathogen is inside the phagocyte, it is enclosed in a phagosome (essentially a bubble to contain the pathogen). The phagosome then fuses with a lysosome, becoming a phagolysosome. The lysosome releases its enzymes, lysozymes, which break down the pathogen. The waste products are then absorbed by phagocyte so they are no longer harmful to the body.
CW
Related Biology A Level answers
All answers ▸Describe the control of the menstrual cycle by the hormones FSH, LH, Oestrogen and Progesterone, in the situation where the person does not become pregnant. You may use a diagram to show how their levels change throughout the cycle.
Describe the main evolutionary trend in digestion across the phyla: Platyhelminthes, Chordata and Annelida
The herbicide atrazine works by disabling plastoquinone, one of the proton pumps in photosystem II. Explain how atrazine would kill a susceptible plant (5 marks) (OCR A specimen paper 3)
Describe the cardiac cycle?