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What is the structure of the human gas exchange system- how do we breathe in and out?

Named structures : trachea, bronchi, bronchioles, alveolinote: surface area increases as you go down levels, highest SA at alveoli Breathing in : diaphragm contracts and external intercostal muscles contract...
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Answered by Ankita S. • Biology tutor
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What are the main differences between Classical Liberalism and Neo-Liberalism?

Classical liberalism unlike neo-liberalism is based more on the ideas of rights rather than economic prosperity. Classical liberalists focus on maximising individual freedom and on autonomy. Additionally, go...
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What is meant by 1st ionisation energy?

The energy required to remove an electron from 1 mole of gaseous atoms to form 1 mole of gaseous 1+ ions
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Answered by Tiffany Z. • Chemistry tutor
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Why does phenol readily undergo electrophilic substitution but benzene does not without the aid of a catalyst?

Benzene's delocalised π system of electrons makes it not quite electron rich enough for the reaction to take place. The lone pair from the -OH group in phenol adds enough electron density into the ring so th...
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y=2x+5, calculate x when y=11

So what we need to do is work out what x is when y is equal to 11.Firstly, we would rearrange the equation so that x is the subject and to do this we subtract 5 from both sides.Thisgives us y-5 =2x. Dividing...
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Answered by Daniaal A. • Maths tutor
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