Top answers

A myelinated axon conducts impulses faster than a non-myelinated axon. Explain this difference:

A myelinated neurone is insulated by a layer of Schwann cells that make up the myelin sheath. This aids in the faster conduction of an action potential down the neuronal axon. Depolarisation of the axon can ...
HP
Answered by Hanna P. • Biology tutor
22844 Views

How does the body respond to raise its core body temprature?

shivering - muscles contract rapidly, causes more respiration which releases energy blood vessels near skin constrict - blood flow to skin decreases, less energy lost to surroundings
CS
Answered by Cara S. • Biology tutor
2666 Views

I have trouble remembering which muscle contracts and which muscle relaxes during the Iris reflex; could you explain it to me?

The first thing to remember is that muscles always act in pairs; so when one contracts, the other relaxes. Think of the muscles in your arm; when you bend your arm towards you, the bicep contracts so becomes...
SK
Answered by Sumayya K. • Biology tutor
35624 Views

Describe how the guard cells surrounding the leaf pores are adapted to their role

unevenly thickened cell wall able to change shape / bendtransport proteins / ion pumps, in plasma membrane(presence of) chloroplasts (to provide, ATP / energy)
FR
Answered by Faiza R. • Biology tutor
5322 Views

Explain the formation of an action potential in a neuron

Firstly, depolarization of the neuronal membrane occurs. This is due to a stimulus which causes voltage-gated sodium ion channels to open, allowing sodium ions to diffuse down their concentration gradient in...
SM
Answered by Sophie M. • Biology tutor
3726 Views