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Explain why an athlete, who has just run a marathon on a summers day, would have higher concentration of ADH (anti-diuretic hormone) in their blood.

The athlete is running a marathon, therefore their muscles are constantly contracting and therefore using up ATP (Energy). ATP is generated through respiration in cells in the human body. Respiration generat...
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Answered by Aryan N. • Biology tutor
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Using your knowledge of the Circulatory System, describe & explain how and why an increase in intensity of exercise leads to an increased heart rate.

Firstly we must understand what exercise does to the body and the Circulatory system. We know that muscles need ATP to contract, this is demanded much more during a more strenuous exercise. ATP is created du...
TD
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Whats the difference between type 1 and type 2 diabetes?

There are important differences between type 1 and type 2 diabetes. They happen in people of different ages and present differently. Type 1 diabetes is found in younger people and is because your body has st...
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Answered by Katba I. • Biology tutor
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What's the difference between aerobic and anaerobic respiration?

In short Aerobic is with oxygen - think aero=air, therefore oxygen is present. This process also produces more energy and takes place on mitochondria only producing carbon dioxide and water from glucose and ...
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Answered by Oliver B. • Biology tutor
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Describe the series of events from the arrival of an action potential at the pre-synaptic membrane of a cholinergic synapse to the generation of a new action potential at the post synaptic membrane?

An action potential arriving at the pre-synaptic membrane stimulates voltage-gated calcium channels to open and calcium ions diffuse into the neuron through these calcium channels. Influx of calcium causes s...
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Answered by Daniella Z. • Biology tutor
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