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GCSE

What is a synapse?

a junction between 2 neurones

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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 fr...

Answered by Jasmine T. • Biology tutor

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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 hear...

Answered by Rosanna L. • Biology tutor

8398 Views

Use your knowledge of the carbon cycle to indicate the effect of deforestation on the carbon dioxide concentration in the atmosphere, and the effect this change will have on the environment.

Atmospheric CO2 is used by trees for photosynthesis. Deforestation means that there are less trees undergoing this photosynthesis reaction, so less CO2 is taken from the atmosphere. The trees that are cut...

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Answered by Áine C. • Biology tutor

4596 Views

Describe the difference between a receptor and an effector, using examples in your answer.

A receptor, such as the eye, detects stimuli so that impulses can be sent to the approriate effector, such as an arm, which will convert the impulse into a response.

Answered by Eden C. • Biology tutor

4014 Views