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An excitation signal (an action potential) is created by the sinoatrial (SA) node.The wave of excitation spreads across the atria,causing them to contract.Upon reaching the atrioventricular (AV) node, the...
The turning effect (or moment) of a force can be calculated using this equation:moment of a force = force (F) x perpendicular distance from the pivot (d)So in this case, the m...
Nitrates are present in artificial fertilisers and farmers add these to their crops to maximise growth. But, due to maybe heavy rainfall or excess fertiliser these nitrates can leach into lakes by surface...
In order to make sure that safety precautions are met, when handling blood samples we must make use of gloves in order to cover all cuts and avoid contact. Furthermore, you must store samples in sealed co...
Respiration: Glucose + Oxygen --> Water + Carbon Dioxide + EnergyIf there is a lack of oxygen then anaerobic respiration will take place instead of aerobic respiration, which in animal...
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