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They are a group of specialised cells that respond to different changes in the environment called stimuli. Different types of receptors have different stimuli they react to such as light, sound, chemi...
An endocrine gland secretes its products, for example hormones, directly into the blood. An example of an endocrine gland is the adrenal gland which secretes adenaline made in the adrenal medulla dire...
Plants have cells within them called photoreceptors. These receptors are light sensitive and the plant can detect the strength and direction of light, which is important for photosynthesis. The mechanism ...
Mitosis can be grouped into four main stages: prophase, metaphase, anaphase and telophase.Prophase: the chromosomes supercondense, the nuclear envelope disintegrates and the centrioles migrate to th...
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