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How is a nerve impulse transmitted along a synapse?

The nerve impulse arrives at the synapse. This triggers vesicles to release chemical messengers (neurotransmitters) into the synapse. These chemicals diffuse across the synapse and bind with membrane recepto...
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Answered by Alex H. • Biology tutor
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Can you explain the food chain?

You always start with the sun which gives its every to grass which is a producer of energy. The arrow in the food chain, therefore, travels in the direction the energy travels in (in this case from the sun t...
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Answered by Amelia H. • Biology tutor
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Describe how a student wouldn’t test for the presence of lipid molecules in a sample of food

The student would conduct an emulsification test. First of all, crush the sample to increase is surface area. Next add the sample to a test tube of ethanol, allowing for he sample to disolve before adding a ...
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Answered by Tobias S. • Biology tutor
3087 Views

Amy has cystic fibrosis which is caused by a recessive allele. Her partner is heterozygous for cystic fibrosis. What is the chance that her future child has cystic fibrosis?

Alleles are different forms of a gene which can become mutated to cause different characteristics or diseases. They can be dominant (usually denonimated by a captial letter H) or recessive (usually denominat...
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Answered by Rebecca M. • Biology tutor
4503 Views

How may cells be specialised to their function?

Despite animal cells all having a nucleus (for genetic information storage and reproduction), a cytoplasm (for structure), mitochondria (for aerobic respiration), ribosomes (for protein synthesis) and a cell...
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Answered by Alec M. • Biology tutor
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