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Describe the events that occur in a reflex action

A reflex action occurs very quickly, and does not involve the brain. The stimulus (e.g. a flame) is sensed by the receptor (the skin). The sensory neurone attached to the receptor sends an impulse to the rel...
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Answered by Flora B. • Biology tutor
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Why is it that Gonorrhoea can be treated with an antibiotic, but HIV cannot?

Gonorrhoea is caused by a bacteria whereas HIV is a virus. Antibiotics are only effective on bacterial diseases, but do not treat viruses as they are found inside the host cell.
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Answered by Sasha J. • Biology tutor
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What is a reflex?

An unconsious action in response to a stimulus. These are very quick movements and have evolved to allow basic protection. For example, when you touch something hot, you automatically remove your hand before...
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Answered by Siobhan C. • Biology tutor
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What is a synapse?

A synapse is the area between two nerve cells, allowing electrical impulses to be passed between them. In order to cross the gap from one neuron to another, the impulse gets converted to neurotransmitter - t...
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Answered by Siobhan C. • Biology tutor
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Janice has cystic fibrosis. Cystic fibrosis is caused by a recessive allele (f). What is the probability of her baby having cystic fibrosis? The baby’s father is heterozygous for cystic fibrosis.

Answer = 50% chance of developing cystic fibrosis
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Answered by Vishal P. • Biology tutor
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