Top answers

Explain the transmission of nerve impulses across a cholinergic synapse

When an action potential arrives at the pre-synaptic neurone, it causes a change in voltage due to the presence of positive Na ions. This causes voltage-gated Ca 2+ protein channels to open and allow calcium...
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Answered by Kimran S. • Biology tutor
5250 Views

Describe the structure and function of the cytoskeleton

An organelle found in all eukaryotic cells made of thin microfilaments of the protein actin and microtubules made of the protein tubulin. Transport is the key role where motor proteins drag organelles from o...
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Answered by Sakina L. • Biology tutor
9474 Views

What is the maximum resolution for a standard optical microscope?

200nm
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Answered by Sakina L. • Biology tutor
3035 Views

How do organelles work together to produce and release proteins from a cell

The nucleus contains all the DNA of a cell. RNA polymerase converts the DNA of the gene corresponding to the desired protein into RNA. The RNA is transported to the rough ER where it is translated into an am...
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Answered by Benjamin H. • Biology tutor
14195 Views

During sampling, discuss the principles and strategies that should be employed in the collection of representative samples.

First it is important to define a representative sample. A representative sample should have a mean very close to the entire population being sampled, i.e. you are able to account for the natural variation o...
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Answered by Rowan S. • Biology tutor
6977 Views