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Explain how a blood clot can cause a heart attack?

A blood clot or thrombus is formed pathologically in the blood stream when the clotting cascade is activated inappropriately. This commonly occurs over the rough vessel surface during atherosclerosis of a...

AK
Answered by Alex K. Biology tutor
8431 Views

How does the kidney filter out different molecules?

In the blood flowing through the kidneys, you find lots of different substances, like glucose and amino acids (which the body wants to keep and use) and urea (which the body wants to get rid of). The firs...

IE
Answered by Isobel E. Biology tutor
4293 Views

Explain how DNA replicates inside a cell

DNA is made up of 4 bases (Adenine, Thymine, Guanine, Cytosine)

Adenine, guanine = purine 'Pure AGony'

Thymine and cytosine  = pyramidines

Adenine pairs with thymine (2 Hydrogen bonds...

CD
Answered by Claire D. Biology tutor
3574 Views

What role does the ITCZ play across different tropical climates?

Tropical Climates can essentially be split into three main categories: Equatorial, Tropical Savanna and Monsoon.

Whilst each of these are hot and Equatorial/Monsoon climates are notably wet, there ...

GH
Answered by George H. Geography tutor
21752 Views

What are common characteristics of Gothic literature?

Gothic literature differs from text to text, as pieces need only contain a few of the classic elements in order to be classed as Gothic.

These elements include, but are not limited to: 

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