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Explain the differences in structure between a vein and an artery

Arteries have a narrower lumen with a thicker layer of muscle tissue which contains more elastic. Whereas veins have a wider lumen with a thinner layer of muscle tissue. Veins also contain valves to prevent ...
LK
Answered by Louis K. • Biology tutor
3199 Views

Explain how the mass balance of a glacier can be an indicator of climate change.

The ELA (Equilibirum Line Altitude) of a glacier identifies the point at which the ablation and accumulation zones are balanced, meaning the mass balance of the glacier is at equilibrium. The altitude of thi...
HG
Answered by Hannah G. • Geography tutor
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i) Briefly explain the difference between anaerobic and aerobic respiration (2). ii) Which of these reactions produce more energy and briefly describe why?(2)

i) Anaerobic and aerobic respiration are both biochemical reactions (see below): ANAEROBIC RESPIRATIONGlucose = lactic acid + energy released AEROBIC RESPIRATIONGlucose + oxygen= carbon dioxide + water + ene...
MC
Answered by Mani C. • Biology tutor
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when do you use the passato prossimo vs l'imperfetto

The passato prossimo is the more common of the two and indicates a past, completed action. e.g. ieri, ho dormito per 8 ore. l'imperfetto, on the other hand is for continuous or repeated actions. e.g when i w...
GC
Answered by Giulia C. • Italian tutor
3098 Views

Expand and simplify 4(x+5) + 3(x-7)

When we're doing algebra and expanding brackets, our first step is to multiply everything inside each bracket by what we have just before the bracket. Let's start with the 4(x+5). 4 lots of our unknown myste...
CM
Answered by Connor M. • Maths tutor
10603 Views