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How does an invading pathogen cause disease?

There are three main ways that an invading pathogen can result in disease: Damage or destroy host cells This is host specific and ligands on the pathogen must fit host receptor proteins on the host cell. Thi...
JC
Answered by Jenny C. • Biology tutor
4944 Views

How are blood glucose levels controlled in the body?

Blood glucose is controlled by a negative feedback mechanism. When blood glucose levels rise, this is detected by beta cells in the Islets of Langerhans in the pancreas. In response, they secrete insulin whi...
EK
Answered by Emily K. • Biology tutor
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What is the difference between a gene, a chromosome and DNA?

Genes, chromosomes and DNA are three vital components of cells and many students often confuse them with each other. DNA stands for Deoxyribose Nucleic Acid. DNA molecules contain the genetic code which is m...
EH
Answered by Emily H. • Biology tutor
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How does information from a gene make a protein?

A gene is defined as a section of DNA that codes for a protein. Within a gene you have triplets which are 3 bases in a row that code for a specific amino acid . However there might be many triplet codes per ...
GM
Answered by Georgina M. • Biology tutor
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What is the second line of defence?

What is the second line of defence? Before we start let’s re-cap some key terminology: - pathogen : a microorganism causing disease or illness to its host - lymphocyte : a small white blood cell involved in ...
TO
Answered by Tumbi O. • Biology tutor
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