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I have trouble remembering which muscle contracts and which muscle relaxes during the Iris reflex; could you explain it to me?

The first thing to remember is that muscles always act in pairs; so when one contracts, the other relaxes. Think of the muscles in your arm; when you bend your arm towards you, the bicep contracts so becomes...
SK
Answered by Sumayya K. • Biology tutor
35627 Views

Le passé Composé (Present Perfect)

It can be translated with the present perfect or the simple past in English. It is used to indicate that an action in the past has been completed. In everyday language, the passé composé is also often used i...
TD
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A curve passes through the point (4, 8) and satisfies the differential equation dy/dx = 1/ (2x + rootx) , Use a step-by-step method with a step length of 0.3 to estimate the value of y at x = 4.6 . Give your answer to four decimal places.

h dy/dx (4) = 0.03y(4.3) = 8+0.03 = 8.03y(4.6) = y(4.3) + 0.3 dy/dx(4.3) = 8.0581 to 4 d.p
KW
Answered by Keni W. • Maths tutor
3998 Views

Describe how the guard cells surrounding the leaf pores are adapted to their role

unevenly thickened cell wall able to change shape / bendtransport proteins / ion pumps, in plasma membrane(presence of) chloroplasts (to provide, ATP / energy)
FR
Answered by Faiza R. • Biology tutor
5324 Views

What makes a good essay?

A good essay always starts with a good plan. It is obvious to a reader/examiner whether or not the writer has put in time to plan. This does not only mean that the writer has thought about the ideas they wil...
LN
Answered by Lucinda N. • English tutor
2094 Views