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The lungs are highly specialised. They have alveoli which are small air sacs. Alveoli give the lungs a big surface area, meaning that more oxygen can diffuse from the lungs into the blood stream, and more...
A cytoskeleton is a structure that acts as a support for the cell. It also maintains the cell shape, holds and moves organelles. It is made from a fibre network dispered in the cell cytoplasm, attached in...
When blood glucose concentration rises above its optimum level of 90mg/100cm3, it is detected by β-cells in the Islets of Langerhans in the pancreas. These β-cells release insulin into the bloo...
Alpha cells in the islets of Langerhans (pancreas)
Normal adult haemoglobin is primarily comprised of 2 alpha and 2 beta subunits and foetal haemoglobin has 2 gamma subunits instead of the 2 betas. Now what this does is increase the binding affinity of th...
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