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Describe 3 ways in which the lungs are adapted to allow efficient gas exchange

Large surface area -Cell wall of alveoli is one cell thick -Good Blood supply
RV
Answered by Roshni V. • Biology tutor
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List 5 processes for which mammals need energy

To maintain a constant body temperature -To aid growth To allow muscle contraction For active transport -For protein synthesis
RV
Answered by Roshni V. • Biology tutor
2844 Views

Describe the sequence of events that create an action potential

Before an action potential can even start, it is important to remember that there are already uneven concentrations of ions over the membrane. Potassium ions are at a higher concentration inside the cell, wh...
RJ
Answered by Rebecca J. • Biology tutor
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What is the difference between 'horror' and 'terror' in Gothic literature?

‘Horror’ and ‘Terror’ Distinction: Horror = physical emotion (sensationalism) Terror = psychological (subtle, sublime) Origins: Horror = Matthew Lewis ('The Monk') Terror = Anne Radcliffe ('The Mysteries of ...
ON
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solve the following equation: x^2 - 7x -15 = 3

Rearrange the equation so x^2 - 7x -18 = 0, then simplify into (x-9)(x+2)=0 -> x=9 or x=-2
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Answered by James S. • Maths tutor
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