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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 Dolcie P. • Biology tutor
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what steps occur in the process of phagocytosis?

Firstly, a foreign pathogen will enter the body and produce chemicals that attract the phagocytes. The phagocytes will recognise this non human protein and engulf and enclose them into a vesicle to form a ph...
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Answered by Holly M. • Biology tutor
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Describe the process of transcription in detail.

Firstly, an enzyme called DNA Helicase will unwind the double stranded DNA. The RNA nucleotides complimentary base pair with the DNA template strand. Phosphodiester bonds are formed between the RNA bases by ...
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Answered by Meera P. • Biology tutor
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What kinds of valves are found in the human circulatory system and how do they differ?

The three main kinds of valves in the human circulatory system are atrioventricular valves , semi-lunar valves and pocket valves . Atrioventricular valves are found in the heart and separate the atria and ve...
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Answered by Elanor B. • Biology tutor
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What are the two main forms of biological classification, and how do they differ?

Artificial classification is used to divide organisms by their characteristics, which can vary depending on the specific situation which you are considering. Features that are considered are known as analogo...
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Answered by Luke K. • Biology tutor
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