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Describe how muscle cells contract

An action potential depolarises the sarcoma and depolarisation travels down the T-tubules to the sarcoplasmic reticulum, which releases Ca 2+ (calcium ions) to the sarcoplasm. Ca 2+ cause tropomyosin to chan...
MS
Answered by Maria S. • Biology tutor
3237 Views

How to do the product rule for differentiation

To do the product rule you must have two functions multiplied together. Here you must make one function be u and the other be v. The formula from this is uv’+vu’ where v’ and u’ are the differentials of the ...
DR
Answered by Daisy R. • Maths tutor
3676 Views

How do I know what auxiliary verb to use in the passé composé?

The passé composé is used to describe a single, completed action in the past. The passé composé is a compound tense, meaning you need two components to conjugate the verb: 1) the auxiliary verb (avoir or êtr...
LK
Answered by Lara K. • French tutor
3424 Views

Describe and explain the trend in boiling points in the first four hydrogen halides

HF has the highest boiling point this is followed by HI, then HBr with HCl having the lowest boiling point of the four molecules. This is because HF is able to form Hydrogen bonds whereas the other three mol...
TM
Answered by Theo M. • Chemistry tutor
61654 Views

Differentiate xcos(x) with respect to x.

How do we know which method of differentiation to use in this example? Well in ‘xos(x)’, we have 2 different functions: ‘x’ and ‘cos(x)’. Therefore, we must differentiate using the product rule. What is the ...
OS
Answered by Oliver S. • Maths tutor
6059 Views