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Why does an action potential travel faster in a myelinated neurone compared to a non-myelinated neurone?

Myelinated and non-myelinated neurones have different structures which is why the speed of action potentials differ. In a Myelinated neurone, a myelin sheath is wrapped around the axon. This myelin sheath is...
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Answered by Saima F. • Biology tutor
17720 Views

Given the reaction: H2SO4 + NaOH --> ? + H2O. (a). Work out the salt produced (?) and (b). calculate the pH of the remaining solution when 1.2 g of NaOH and 4.41 g of H2SO4 were added in a 500 ml solution. Of the unreacted H2SO4 95% dissociated.

(a). Firstly, to work out the product, take 2Na + + SO 2 - --> 2 Na 2 SO 4 . (b). To calculate the pH, the equation: pH = -log 10 ([H + ]) must be used. Therefore we need to find the concentration of hydr...
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Answered by Dan W. • Chemistry tutor
6856 Views

Is the function f(x)=x^3+24x+3 an increasing or decreasing function?

f(x)=x^3 +24x+3 f'(x)=3x2+24 Since x^2>0 for all real x 3x^2+24>0 So f(x) is an increasing function
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Answered by Danni M. • Maths tutor
4847 Views

How to factorise 6x^2-11x-10?

Firstly, when we need to factorise an expression like ax 2 + bx + c, we should find two numbers m and n such that mn = ac and m+n = b. In this question, a = 6, b = -11, c = -10. So mn = -60 and m+n = -11. Le...
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Answered by Yunxi S. • Maths tutor
19035 Views

Given that a light ray enters a glass prism at angle of 50 degrees from the normal and is refracted to an angle of 30 degrees from the normal, calculate the speed of light in glass.

Answer: 1.96 10 8 ms -1 .Snell's law tells us that n 1 sin(x 1 )= n 2 sin(x 2 ) where x is the angle of a light ray from the normal. Air can be assumed to have a refractive index of 1. Therefore, sin(x 1 ) =...
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Answered by Charlie H. • Physics tutor
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