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How can one remember the function and the anatomy of the cardiac valves?

There are 4 cardiac (from the Greek 'καρδία', meaning 'heart') valves. Physiology (Function) - The pulmonary and aortic valves prevent the backflow of blood from the pulmonary artery and aorta into the ventr...
AH
Answered by Ariadne H. • Biology tutor
9679 Views

What are the key features of intensive rearing?

A mnemonic can be used for such questions which ask for 4/5 points. With intensive rearing for example: My Whale Does Yoga Sometimes. M - movement, W - warmth, D - diet, Y - young, S - selective breeding. Fr...
EM
Answered by Emily M. • Biology tutor
2930 Views

What happens when a muscle contracts?

Looking at a diagram of muscle cells you can identify: Z lines, H zone, I band, and A band. The Z lines move closer together, H zone becomes more narrow, as does the I band, and the A band remains the same w...
EM
Answered by Emily M. • Biology tutor
3796 Views

How is ATP produced in the mitochondria?

The Krebs cycle produces ATP by substrate level phosphorylation. The cycle is completed twice per glucose molecule. It also produces NADH which goes on to donate an electron to the electron transport chain o...
EM
Answered by Emily M. • Biology tutor
24715 Views

How is blood glucose concentration regulated, with reference to insulin, glucagon and the liver?

• The alpha and beta cells monitor the concentration of glucose in the blood • The normal blood glucose concentration is 90mg of glucoses in every 100cm³ of blood • If the concentration rises or falls away f...
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Answered by Gabriel A. • Biology tutor
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