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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 membrane...
SA
Answered by Syed A. • Biology tutor
2631 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 with t...
AM
Answered by Aislinn M. • Biology tutor
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What is a network protocol and why do we need it?

In computer networking, in order for two end devices to communicate in some way, we need rules. These rules are called network protocols. Network protocols are predefined set of rules for effective communica...
TM
Answered by Toma M. • Computing tutor
5922 Views

Two simultaneous questions are given as 3x+2y = 9, and x-2y = -5. Find the values for x and y

Can be solved in 3 ways: Substitution - can rearrange equation 2 to for x = 2y-5. Then substitute this in to equation 1 to form, 3(2y-5)+2y = 9. Multiply out the brackets and rearrange to form 8y = 24, so y=...
AS
Answered by Aman S. • Maths tutor
5948 Views

Make y the subject of this formula: 9x = p(8 + y) + 5

When rearranging an equation, the most important thing to remember is that whatever you do to one side of the equation you must do to the other. In order to make y the subject you want to isolate it so that ...
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Answered by Tara B. • Maths tutor
4499 Views