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What is the difference between diffusion and osmosis?

Diffusion is a passive process whereby molecules move from areas of high to areas of low concentration, down the concentration gradient. Osmosis is also a passive process however only refers to movement of w...
RN
Answered by Roisin N. • Biology tutor
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Describe similarities and difference between plant and Aminal cells

Similarities both are eukaryotic cells and therefore have a nucleus they both have cell membranes which can control what enters and exit the cell they both contains cytoplasm - this is where reactions is the...
SB
Answered by Sara B. • Biology tutor
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Maltase is an enzyme found in the body that breaks down maltose. Explain why maltase can only catalyse this reaction?

All enzymes have active sites which are highly specific to their role within the body- the active site being the part of the enzyme in which the enzyme and the substrate (the thing it is reacting with) inter...
JH
Answered by Johanna H. • Biology tutor
8765 Views

Describe how heart action is coordinated with reference to the SAN, AVN, and Purkyne Tissue, and explain the importance of the valves within the heart (8 marks)

The SAN (pacemaker) sends a wave of excitation across both atria . This triggers atrial systole, where both atria contract simultaneously . There is a time delay at the AV Node which allows the atria to empt...
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Answered by Octavia B. • Biology tutor
5306 Views

What is the difference between cellular respiration and breathing (respiration)?

Respiration (breathing) is the way your body gets oxygen into the lungs from the air outside.Cellular respiration describes how your cells make ATP - a molecule used to provide energy for chemical reactions.
HC
Answered by Harry C. • Biology tutor
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