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How do I do a close reading of a poem?

In order to close read a poem, I would recommend reading the poem over a few times, and to start with highlighting anything that stands out to you. This could include alliteration, capitalisation of words, u...
MT
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How do you find the minimum of the equation sin^2(x) + 4sin(x)?

The first step to solving this problem is to treat it as a normal quadratic equation; if you are struggling with comparing our equation to a normal quadratic, try substituting sin(x) = y into the equation as...
KS
Answered by Kirsten S. • Maths tutor
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Explain how voltage-gated sodium ion channels on the membranes of neurones generate an action potential.

At rest there is a difference in the concentration of sodium ions (Na+) across the membrane of the neurone. Outside the neurone in the extracellular fluid (ECF) the concentration of Na+ is around 140 mEq/L w...
AH
9524 Views

Describe the effect of calcium ions on tropomyosin and actin in skeletal muscle.

Within the muscle fibre tropomyosin is wrapped around actin filaments and it blocks the binding sites for the myosin-heads. When calcium ion concentration increases, calcium ions bind to sites on the tropomy...
AH
19203 Views

Describe the roles of DNA and RNA in determining the sequence of amino acids in proteins.

The sequence of bases (a gene) on DNA determines the order of amino acids that come together to form a polypeptide (protein) chain. The DNA is 'unzipped' by enzymes called Helicases. This allows a single str...
AH
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