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Why do nerve impulses travel faster in myelinated neurons?

The myelin sheath is a fatty layer made up of the hugely expanded plasma membrane of schwann cells which surround the axon of neurons. The axon is unprotected where the sheath of one cell meets the next and ...
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Answered by Hannah T. • Biology tutor
25805 Views

what factors effect the rate of transpiration?

1) Wind- strong winds blow the evapourated water away from the leaf so that when it condenses, it will not go back into the leaf via the stoma 2) Temperature- high temperatures lead to higher rates of transp...
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Answered by Jasmine M. • Biology tutor
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What is the difference beween biological species concept and the phylogentic approach to defining species?

The biological species concept classifies species as a group of actually or potentially interbreeding individuals. This means that any two individuals (well a male and female) within the group could breed an...
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Answered by Harriet H. • Biology tutor
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Explain how the eye responds to different light levels.

Light is a sensory stimulus detected by the eye. Rods and cones located in the retina of the eye respond to light. The pupillary reflex is responsible for controlling the amount of light hitting the retina. ...
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Answered by Dominic S. • Biology tutor
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What are receptors?

They are a group of specialised cells that respond to different changes in the environment called stimuli. Different types of receptors have different stimuli they react to such as light, sound, chemicals an...
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Answered by Emily O. • Biology tutor
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