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Describe the effects of nitrogen and phosohorus fertiliser leaching into a lake

This will cause eutrophication. Under normal circumstances, nutrients are a limiting factor for algal growth. When the fertiliser leaches into the lake, the excess nutrients will therefore allow algae at ...

Answered by Alasdair R. Biology tutor
3207 Views

How can diet increase risk of cardiovascular disease?

A diet high in saturated fats can increase risk of cardiovascular disease. This is due to higher blood cholesterol levels. Cholesterol is a major constituent of the fatty streaks deposited in the artery l...

Answered by Ayaz A. Biology tutor
2504 Views

What is acetylcholine?

Acetylcholine is a neurotransmitter used by cholergenic neurones.Neurotransmitters are chemicals used as a signalling molecule across a synapse.Acetylcholine will be released from the presynaptic bulb fro...

Answered by Abby-Lee M. Biology tutor
4296 Views

Can you explain ultrafiltration to me?

Ultrafiltration is the filtering of blood at the 69000 rmm molecular level. It occurs between the glomerulus and the bowman's capsule in the nephron of the kidney.There are three layers to the filtration;...

Answered by Abby-Lee M. Biology tutor
4151 Views

Name and describe the process that leads to air entering the lungs

This process is called Ventilation and is a required step in aerobic respiration.This process starts with the diaphragm contracting, one also sees the (external) intercostal muscles contract. These contra...

Answered by Sam M. Biology tutor
2300 Views

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