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Biology
GCSE

Describe how insulin returns the blood glucose concentration to normal.

Insulin acts a key to open the way for glucose to enter cells (hepatocytes, muscles and brain cells)Hepatocytes absorbs more glucose from blood. Glucose converted to glycogen- for storage...

Answered by Emma K. Biology tutor
1113 Views

immunisations - describe two disadvantages of vaccinations ?

Although vaccinations are very beneficial they do carry risk factors - they can cause mild swelling, soreness, a mild form of the disease (they are being vaccinated for), and rare major harmful reactions....

Answered by Ameenah R. Biology tutor
1708 Views

What are embryonic stem cells? Why are stem cells useful to doctors + why this discovery may make fewer people object to their use

Embryonic stem cells are unspecialised or undifferentiated. This means they can divide to form any type of cell. Embryonic stem cells could be used in medicine to replace damaged cells. This could treat d...

Answered by Emily Jill D. Biology tutor
1433 Views

How do organims evolve via natural selection?

Natural selection is all about the 'survival of the fittest' - the organisms which are best suited to their environment are most likely to survive and have offspring, leading to a change in allele frequen...

Answered by Katie J. Biology tutor
1068 Views

How does the body respond to an increase or decrease in temperature to maintain homeostasis?

Increase in temperature:Sweat produced from sweat glands increases energy transfer away from the body when it evaporates.Vasodilation of blood vessels close to the surface of the skin, which increases ene...

Answered by Arianne M. Biology tutor
1255 Views

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