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Chloroplasts are organelles found only in plants that allow the plant to release energy from sunlight through photosynthesis. They are green in colour because they contain the pigment chlorophyll.

The athlete begins to sweat, as exercising releases energy from the body in the form of heat, so the water evaporating from the surface of the skin results in the body cooling down.

Can efficiently absorb sunlight- upper part of leaf contains tightly packed palisade mesophyll cells; cells have large vacuole which pushes chloroplasts to the edge of leaf and well devel...

The action potential lies at the heart of how we think, move and sense, as it constitutes the language of the nervous system. The two main characters in the spectacle of the action potential are ...

blood sugar concentration is controlled through a negative feedback loop*. When blood glucose concentration is high, insulin made in the pancreas is released into the bloodstream. Glucose is taken into ce...