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What is the key difference between the rough endoplasmic reticulum (RER), and smooth endoplasmic reticulum (SER)?

The RER is associated with translation of proteins, including protein folding. It is known as 'rough' because it is has ribosomes immersed in it, which makes it easy to remember the protein function. The SER...
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Answered by Ivan S. • Biology tutor
15239 Views

Humans have reflexes. Describe the route of an impulse through a reflex arc.

First of all, the IMPULSE IS DECTECTED by receptors.SENSORY neurone passes impulse onto RELAY NEURONE in SPINAL CORD.RELAY neurone passes impulse onto MOTOR neuroneMOTOR neurone passes impulse to EFFECTOR MU...
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Answered by Ozbil D. • Biology tutor
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Describe the role of the myelin sheath surrounding the axon

It is important to remember that the myelin sheath is essential for our nervous system.It forms a layers of fatty material around the axon. This allows INSULATION, which, in turn, allows quicker conduction o...
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Answered by Ozbil D. • Biology tutor
10020 Views

What are the key principles of evolution?

Variation: there is variation in the physical and behavioural characteristics of a set of organisms. This variation is caused by a combination of genetic and environmental factors. Inheritance: there is a me...
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Answered by Ivan S. • Biology tutor
5745 Views

Qu-est ce que tu as fait le weekend dernier?

What did you do last weekend? This question helps the student to think about vocab relating to pastimes and hobbies as well as the passé composé tense. It also opens up the possibility of using the simple fu...
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Answered by Kathy G. • French tutor
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