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How do the properties of water explain its vitality in living organisms?

First, let's talk about the components of water. Water molecules are made of two hydrogen and one oxygen atom bonded together covalently, like many other molecules. However, water is extremely special becaus...
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Answered by Adedayo S. • Biology tutor
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What are the different ways in which substances can move across cell membranes?

Passive transport Diffusion = occurs in gases or aqueous solutions whereby particles are free to move and spread from a higher concentration to a lower concentration. An example is air freshener being spraye...
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Answered by Alisha R. • Biology tutor
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How does energy move through a food chain?

In most food chains, all of the energy which is used originally comes from the sun. Plants are "photoautotrophs", which means that they can use light energy from the sun to fuel their life processe...
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Answered by Daniel M. • Biology tutor
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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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