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Write a critical appreciation of this passage, relating your discussion to your reading of American Literature 1880-1940.

The setting of this extract seems to indicate a narrative voice based in one of the southern states, a rural town where work has finished for the day and action has been replaced by a kind of interior observ...
MH
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Why does an action potential not flow backwards in a neuron? How does it always reach the pre-synaptic knob?

When an action potential occurs, the neuron reaches the maximum voltage of +40mV. It then begins to repolarise, with potassium ions diffusing back in to the neuron, down the concentration gradient. This make...
EM
Answered by Erin M. • Biology tutor
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Describe the loading and unloading of oxygen by Haemoglobin in red blood vessels

Haemoglobin is a protein consisting of four haem groups contained in four polypeptide chains. The loading of oxygen consists of oxygen binding to iron in the haem group at areas of higher oxygen concentratio...
Answered by • Biology tutor
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What are the definitions of a)voltage and b)current?

a) Current is defined as the rate of flow of charge; I = Q/t (Current is charge/time).b) Voltage is an electromotive force which drives the charge around the circuit. A potential difference between two point...
SC
Answered by Shrey C. • Physics tutor
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When is the present subjunctive used?

The subjunctive is a mood rather than a tense and, unlike in English, is used frequently in the French language in both spoken and written forms. It is used: when expressing personal desire (e.g. je veux que...
OT
Answered by Olivia T. • French tutor
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