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What is osmosis and how does it differ from diffusion?

Diffusion and osmosis are very similar processes. Osmosis is a particular case of dissusion, therefore it is easier to explain the overarching theory of diffusion first. Diffusion is a gradual movement of pa...
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Answered by Sam J. • Biology tutor
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What is a synapse?

a junction between 2 neurones
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Answered by India G. • Biology tutor
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What is homeostasis? Can you use a couple of examples to explain the difference between positive vs negative feedback?

DEFINITION Homeostasis = the maintenance of a constant internal environment Every process in the body that occurs in everyday life, such as keeping the heart beating, changing from sleep to wakefullness, tal...
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Answered by Jasmine T. • Biology tutor
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What are the electrical changes in an axon that occur during an Action Potential?

The resting potential of the axon membrane is around -70mV, where it is more negative on the outside of the axon than the inside. A stimulation causes Na+ (sodium ions) channels in the axon membrane to open ...
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Answered by Belia F. • Biology tutor
5182 Views

How does the heart pump blood around the body

The heart is divided into four chambers: the right atrium, right ventricle, left atrium and left ventricle [insert diagram]. The right side of the heart pumps blood to the lungs. The left side of the heart p...
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Answered by Rosanna L. • Biology tutor
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