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How do I work out the magnification of an image?

For these types of questions, start by writing out the equation for magnification: Magnification = (size of image) / (size of real object). Then, find the values given in the question that can be plugged int...
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Answered by Chloe R. • Biology tutor
32596 Views

a) Explain how an action potential is passed across a synapse b) Label the graph below with the steps of action potential generation c) The graph shows the results of a study on two groups taking different medication, is the difference significant?

a) When an action potential arrives at the presynaptic membrane there is an influx of calcium ions which allows the vesicles containing neurotransmitter to move to and fuse with the presynaptic membrane. The...
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Answered by Catrina K. • Biology tutor
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Identify the differences between motor and sensory neurons in terms of features and function.

Motor neurons have a cell body, short dendrites and a long axon. Their function is to conduct impulses to an effector (muscle or gland).Sensory neurons, on the other hand, have a cell body, long dendrites an...
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Answered by Michelle M. • Biology tutor
30188 Views

With the aid of a diagram describe the events occurring in the neurone leading to the establishment of an action potential

Voltage-gated Na + channels and Voltage-gated K + channels are closed at rest, Once a stimulus is applied, the neurotransmitters activate chemically-gated (CG) channels within the cell membrane. CG Na + chan...
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Answered by Olga Y. • Biology tutor
3806 Views

Calculate the frequency of genotypes in a population in Hardy Weinberg equilibrium with the allele frequencies of A=0.6 and a=0.4. Thus calculate the number of individuals with each genotype in a population of 150

A= 0.6 a= 0.4 p+q=1 where p=A and q=a p 2 +2pq+q 2 =1where AA=P 2 Thus AA frequency in the population = 0.6 2 = 0.36Aa=2pq Aa frequency in the population = 2(0.4 X 0.6) = 0.48aa=q 2 aa frequency in the popul...
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Answered by Harvey B. • Biology tutor
7155 Views