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How is immunity reached after a vaccine is given? Include the roles of both T cells and B cells.

The vaccine contains either dead or attenuated pathogens, or they can contain just antigens from the pathogen. When one is injected with a vaccine the white blood cells within the body are able to recognise ...
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Answered by Chizara L. • Biology tutor
2951 Views

What's the best work experience to get for medical school?

Look at things you already do and think how that may be applicable to being a medical student/ Doctor. For instance, I had a part time Job working for Lush which would involve talking to customers about heal...
DC
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Pensez-vous que l'on fait assez pour éduquer les jeunes pour mener une vie saine?

A mon avis, on ne fait pas assez pour éduquer les jeunes pour mener une vie saine. L'obésité infantile devient de plus en plus un problème. Bien que certaines publicités fassent la promotion d'un mode de vie...
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Answered by Amy C. • French tutor
2326 Views

Consider the unit hyperbola, whose equation is given by x^2 - y^2 = 1. We denote the origin, (0, 0) by O. Choose any point P on the curve, and label its reflection in the x axis P'. Show that the line OP and the tangent line to P' meet at a right angle.

We differentiate our equation with respect to x to find that 2x - 2y(dy/dx) = 0, and rearrange to find that dy/dx = x/y. We set P = (x, y). The slope of OP is given by y/x, and the slope of the tangent at P'...
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Answered by Dylan C. • Maths tutor
3753 Views

Show that the volume of the solid formed by the curve y=cos(x/2), as it is rotated 360° around the x-axis between x= π/4 and x=3π/4, is of the form π^2/a. Find the constant a.

After sketching a diagram of the curve and the solid for clarity, we see that we need to use the formula V = π∫ y 2 dx (with upper and lower bounds of 3π/4 and π/4 respectively) to calculate the volume of th...
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Answered by Nicholas C. • Maths tutor
3739 Views