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Explain how a synapse between two neurons functions

When impulse arrives at pre-synaptic terminal, the depolarisation opens the voltage-gated Ca2+ ion channels. This causes Ca2+ to enter synapse due to differences in concentration. This causes the vesicles to...
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Answered by George B. • Biology tutor
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Solve the Simultaneous equations. 3x+5y=22 4x-5y=6

3x+5y=224x-5y=6Our first task is to cancel out one of the variables. So you see that both y variables have a 5 before them. As one has -5 and the other has +5 you can add both simultaneous equations together...
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Answered by Chris L. • Maths tutor
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A group of 35 students were asked if they owned a laptop or a TV. 10 said they had both. 12 said they had only a TV. 20 said they had atleast a laptop. A student is picked at random. What is the probability that the student has neither a laptop or a TV?

So there are 35 students in total. 10 which have both a laptop and a TV and 12 with only a TV. There are 20 students that own laptops. We have to find out how many students only have laptops. To do this we h...
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Answered by Chris L. • Maths tutor
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Describe the process of phagocytosis of a pathogen.

The membrane of the phagocyte surrounds the pathogen and engulfs the pathogen. Enzymes inside the phagocyte break down the pathogen and destroy it. Pathogen proteins can then be presented on the surface of t...
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Answered by Harriet B. • Biology tutor
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A graph of a linear equation passes through 2 points, (2,9) and (-3,-1). Find the equation of the line in the form y=mx+c.

So first of all in finding the equation of this line, we shall find the gradient of the line which is represented by m. To find m, we use a formula and the values in the 2 coordinates. The first coordinate w...
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Answered by Ryan M. • Maths tutor
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