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The oxygen supply to the lungs can be increased during vigorous activity by inhaling more deeply and more rapidly. This will cause a larger volume of air to be taken in per breath, which exposes the capil...

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Contain Haemoglobin, the molecule for carrying oxygen through the blood. Bi-concave shape, to give a large surface area for diffusion of oxygen. No nucleus to make more space for haemoglobin for oxygen tr...

To find the coordinates of the point, we have to solve the equations simultaneously. To do this, we need the same number for the coefficient of x or y in each equation. Arbitrarily, we will chose to match...

Alkali metals are in group 1, so they have only one electron in their outermost shell. They are trying to loose this electron so they can obtain a noble gas configuration. This means that they will react ...