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Describe the structure of the heart, relating to it's function.

The heart is divided into two halves - right and left. In each half there are two chambers - an atria and a ventricle, which are connected by a valve. The right atria receives deoxygenated blood from the bod...
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Answered by Tom T. • Biology tutor
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Describe and explain how blood in the right ventricle travels to the left atrium.

The muscle of the right ventricle contracts. This forces the {right atrio-ventricular/tricuspid} valve to close and the {right semi-lunar/pulmonary} valve to open. The blood is pumped through the pulmonary a...
DA
Answered by David A. • Biology tutor
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Explain the stages of an ECG trace.

The P wave is caused by the contraction of the atria, forcing the blood into the ventricles. The sinoatrial node, produces a wave of depolarisation which causes the atria to contact and therefore the p wave....
Answered by • Biology tutor
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What factors influence the rate of photosynthesis?

There are 3 factors that can influence the rate of photosynthesis: light intensity, carbon dioxide concentration and temperature. Light intensity influences photosynthesis as light is required during the pho...
RS
Answered by Ruby S. • Biology tutor
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Differentiate between a prokaryotic and a eukaryotic cell.

Prokaryotic and eukaryotic cells are the 2 types of cells that exist on Earth.Prokaryotes are single celled organisms that lack a distinct nucleus with a membrane. Their DNA is supercoiled and free floating ...
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Answered by Matthew M. • Biology tutor
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