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Name how the structure of the three main blood vessels are adapted to their function.

A) Arteries - Arteries carry blood away from the heart at high blood pressure. Therefore they have a thick muscle layer and elastic tissue in their walls to cope with and maintain the high blood pressure pro...
CE
Answered by Christa E. • Biology tutor
3581 Views

Explain how polymerase chain reaction is used in DNA fingerprinting

DNA extracted from a crime scene is normally available in small quantities so PCR can be used to amplify this quantity to a reasonable concentration which can then be used to run a gel electrophoresis to ide...
NS
Answered by Nikita S. • Biology tutor
17002 Views

How is blood pumped around the heart and to the body?

The pumping of the heart is split into two main phases, diastole (relaxation) and systole (contraction) and involves the four main chambers of the heart, the atria and ventricles, as well as the associated v...
RJ
Answered by Rhiannon J. • Biology tutor
3226 Views

Explain how gaseous exchange occurs in the lungs

Oxygen enters the nose/mouth along the trachea, bronchi, bronchioles and finally into the alveoli.The exchange of gases occurs between the alveoli and blood in the capillaries that supply the lungs. Capillar...
TD
3828 Views

Explain how the formation of glycogen in liver cells leads to a lowering of blood glucose concentration.

In hepatocytes, glycogenesis occurs where glucose is converted to glycogen. This causes a decrease in glucose concentration in the cell in comparison to the plasma thus maintaining a concentration gradient. ...
ZA
Answered by Zubair A. • Biology tutor
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