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1 a) Please label the following diagram of the respiratory system. b) Describe the role of the diaphragm in the mechanism of breathing.

1 a) Trachea, bronchi, bronchioles, alveoli,diaphragm b) It is a muscle important in the function of respiration On inhalation, the diaphragm CONTRACTS and FLATTENS. Air is drawn INTO the lungs (INCREASE in ...
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Answered by Lauraa B. • Biology tutor
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Describe how the hormone glucagon helps a healthy individual to maintain their blood glucose concentration correctly.

When an individual's blood glucose concentration rises above the normal range (approximately 70-100mmol/100cm^3), alpha cells in the Islets of Langerhans in the pancreas detect this change and release glucag...
TD
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Not all mutations result in a change to the amino acid sequence of the encoded polypeptide. Give an explanation.

The first reason is that the genetic code is redundant. This means that even though different codons have different matching t-RNAs and therefore usually different amino acids, some codons are matched with t...
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Answered by Luisa B. • Biology tutor
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How do enzymes work and what would be the effects of an increasing temperature on an enzyme controlled reaction?

Enzymes are biological catalysts that work by increasing the speed of a reaction, without being altered or used up in the reaction. Each enzyme has an active site specific to a particular substrate and there...
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Answered by Jessica H. • Biology tutor
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Describe how receptors in the skin function.

Receptors in the skin detect changes in the environment, so called stimuli. These could include a change in temperature or sensation, such as increased pressure, being touched somewhere or experiencing pain....
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Answered by Luisa B. • Biology tutor
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