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Animal cells have a cell membrane, which surrounds the outside of the cell to maintain its shape and to keep the cell components inside. They also have a nucleus, which contains all of the genetic mater...
Heat is sensed by temperature receptors in the skin of the hand. The signal generated by the receptors in response to heat travels along a sensory neurone to the ...
Despite the fact that the stomata open in response to light, they may close on a hot day in order to conserve water. This is because the heat may cause the water to evaporate out through the stomata, caus...
Pathogens are microorganisms that cause disease. They may be bacteria, viruses, protists or funghi. They can infect animals and plants, causing a wide range of diseases.
Pathogens, such as bacteri...
The CNS (Central Nervous System) consists of the brain and the spinal cord. Neurones, found in the nervous system, are nerve cells that carry information in the form of electrical signals/impulses. There ...
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