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What is the role of the myelin sheath in the transmission of electric impulses in the nervous system?

It is important to note that the IB syllabus expects the students to understand that "The myelination of nerve fibres allows for saltatory conduction." What this essentially means is, that the myel...
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Answered by Clara S. • Biology tutor
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What are Mendel's two laws of inheritance?

Mendel's two laws of inheritance are: the law of segregation and the law of independent assortment.
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Answered by Sara P. • Biology tutor
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Describe the process of protein synthesis.

A copy of the gene to be coded in DNA is made from messenger RNA (mRNA). mRNA travels out of the nucleus and attaches to a ribosome. The ribosome joins amino acids together in the order determined by mRNA.
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Answered by Arjun T. • Biology tutor
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how does aveoli allow for a more efficient gas exchange in mammals?

avoli are small chambers that branvh off from the bronchioles in the lungs, and is where gas exchange directly occurs. these have quite an ireegular shape and contain many fold in its structure, this allows ...
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Answered by Cristina S. • Biology tutor
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Explain how the use of antibiotics might lead to a resistant strain of bacteria arising.

-Antibiotics kill individual bacterial cells. Random mutation of the DNA in a bacterial cell might confer antibiotic resistance to that bacterial cell. A cell with the resistance mutation is less likely to b...
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Answered by Mark P. • Biology tutor
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