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How does the heart pump blood around the body?

Firstly it is very important to understand the basic anatomy of the heart, so I would ensure all students would be able to visulise and draw the structure of the heart and are capable of labelling the pathwa...
EM
Answered by Emma M. • Biology tutor
4338 Views

What are the different roles of synapses in the nervous system?

When discussing synapses we tend to think of a typical cholinergic (uses an acetylcholine neurotransmitter) synapse, which transmits an action potential from the synaptic bulb of the presynaptic neurone to t...
ID
Answered by Isabelle D. • Biology tutor
9051 Views

Why does the nervous system have synapses if they slow down transmission?

Synapses are chemical connections between neurons which do indeed slow down transmission. However, they provide the nervous system with many benefits that could not be achieved without them: They ensure that...
SJ
Answered by Samuel J. • Biology tutor
21461 Views

The genetic code is described as being degenerate. What does this mean? and why ?

We say that the genetic code is degenerate because there are several codons, which code for the same amino acid. For example UCA, UCU, UCG and UCC all code for Serine. This is due to the fact that mRNA codin...
MD
Answered by Maria D. • Biology tutor
14491 Views

Describe the synaptic transmission of a nerve impulse

-action potential arrives at the axon terminal -voltage gated calcium ion channels open (due to the influx of sodium), -calcium ions diffuse into the synaptic knob -synaptic vesicles containing the neurotran...
PB
Answered by Phoebe B. • Biology tutor
3009 Views