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Biology
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Outline how the first neurone communicates with the second neurone at a synapse.

The neurotransmitter e.g. Acetylcholine is excocytosed at the presynaptic membrane, the neurotransmitter diffuses across the synaptic cleft, down its concentration gradient, then attaching to complementar...

MG
Answered by Maria G. Biology tutor
2997 Views

Guillain-Barré syndrome and multiple sclerosis both cause muscle weakness and loss of muscle function. Suggest and describe how the function of neuromuscular junctions will be affected by Guillain-Barré syndrome and multiple sclerosis.

As both disorders reduce the speed at which nerve impulses are conducted, there will be fewer action potentials conducted at the neuromuscular junction (NMJ). With fewer action potentials...

HS
Answered by Hibba S. Biology tutor
8789 Views

Explain why podocytes are usually unable to undergo mitosis.

The podocytes are arrested at G0 of the cell cycle. If podocytes frequently underwent mitosis, it would alter the number and ...

HS
Answered by Hibba S. Biology tutor
13159 Views

What are stable ecosystems? Can you give an example?

A stable ecosystem is where the outputs (losses of the ecosystem) equal the inputs (gains) - there is a balance. They are supported by what they produce, and their structure and function remain constant f...

SA
Answered by Samhitha A. Biology tutor
4153 Views

Starch is made from two alpha-glucose polymers, amylose and amylopectin. Which is quicker to break down and why?

Amylose is formed from 1-4 glycosidic bonds, creating a compact spiral structure. It is unbranched, therefore enzymes can only work from either end to break the bonds and release glucose monomers - broken...

SA
Answered by Samhitha A. Biology tutor
9410 Views

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