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Explain the carbon cycle.

Carbon-containing compounds in organic waste are broken down by microorganism for respiration, releasing CO2 to the atmosphere. This CO2 is taken in by plants for photosynthesis to produce glucose, to be use...
YC
Answered by Young C. • Biology tutor
5789 Views

How is an action potential (AP) transmitted across a synapse?

As an action potential (AP) arrives at the synaptic knob and depolarises the presynaptic membrane, voltage-gated Ca2+ channels open, allowing the entry of Ca2+ ions, This caues vesicles (membrane-bound organ...
YC
Answered by Young C. • Biology tutor
7012 Views

How are the lungs specialised for exchanging gases?

The lungs are made up of many air sacs called alveoli. The alveoli have many folds which create a large surface area. The larger the surface area, the greater the area of alveolar cell membrane available for...
LA
Answered by Laura A. • Biology tutor
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How does osmosis and diffusion work?

Osmosis and diffusion are two words used to describe the movement of molecules. Molecules are like people. They don't like to be squashed into small areas with lots of other molecules surrounding them. Molec...
JD
Answered by James D. • Biology tutor
5480 Views

1) Gluconeogenesis 2) Glycogenesis 3) Glycolysis. Which is stimulated by glucagon production? [A] 1, 2, 3 [B]1 [C] 2, 3 [D] 1,2

B is the answer. Glucagon stimulates an increase in blood sugar/ [glucose] Gluco means glucose is the product Glyco means glycogen (storage of glucose in animals) is the product Neo means substrate is from a...
JM
Answered by James M. • Biology tutor
4125 Views