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What is a nerve synapse and how does it work?

What is a nerve synapse? A synapse refers to the junction between two neurons. When an impulse (action potential) reaches the end of a neuron (the pre-synaptic neuron), the synapse allows this signal to be t...
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Answered by Jamie H. • Biology tutor
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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
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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
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Answered by Roshni V. • Biology tutor
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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...
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Answered by Rebecca J. • Biology tutor
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Describe how smoking damages the lungs

Smoke contains contents that can irritate the respiratory tract, which can lead to inflammation of the Bronchi. This is termed Bronchitis. Cilia may be damaged by tar, leaving them immobile, which means that...
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Answered by Hayley O. • Biology tutor
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