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Vaso-dilation: blood vessels near to the skin's surface dilate which allows more heat to be lost. This is because more blood can flow through as there is more room in the lumen.

1. Light energy from the Sun excites electrons in chlorophyll and the excited electrons are emitted.2. The chlorophyll molecule is now positively charged and chemically less stable. The lost electrons ...

Mark-release-recapture is a technique used to estimate the size of a population of a particular species. The steps involved are:1. Capture and count animals.2. Mark them in a way which is not toxic/harmfu...

The oxygen-haemoglobin dissociation curve is a graph that compares the % of haemoglobin saturated with oxygen on the y-axis to the partial pressure of oxygen in the blood on the x-axis (mmHg). It is a...