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What is Exocytosis?

Exocytosis is the process by which a cell secretes large substances (such as digestive enzymes or hormones) that have been produced inside the cell. Substances produced inside the cell are processed in an or...
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Answered by Lucy S. • Biology tutor
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How is an Action Potential produced in a neurone?

It is all to do with the movement of ions in and out of the neurone cell, which changes the potential difference accross the cell's membrane. - In a neurone's resting state, the inside of membrane is more ne...
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Answered by Lucy S. • Biology tutor
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Describe what is meant by photoperiodism

A response controlled by relative light and dark periods. The name of the receptors responsible for absorbing light are phytochromes. The photoperiodic stimulus is detected by the leaves of the plant.
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Answered by Amy O. • Biology tutor
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Describe the reflex arc.

A stimulus (for example a pin) stimulates the receptor which causes a nerve impulse in the sensory neuron. The impulse travels to a synapse in the spinal cord, where chemicals diffuse across the gap in the s...
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Answered by Sophie S. • Biology tutor
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What is a metabolic rate?

The rate of chemical reactions within the body.
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Answered by Sophie S. • Biology tutor
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