Similar Posts
Which cells exactly die in Parkinson’s disease?
In Parkinson's disease, the nerve cells that secrete dopamine, which are located in the substantia nigra, die. Dopamine is formed from levodopa and dopa decarboxylase. And levodopa from tyrosine and tyrosine hydroxylase. Apparently, Parkinson's patients lack tyrosine hydroxylase (why?), and therefore cannot produce levodopa. Therefore, it is administered as medication. This allows dopamine to be…
What does the figure of long-term potentiation show?
Hello, I'm trying to refresh my biology knowledge for university. I'm currently working on long-term potentiation and I'm looking at this diagram. What is the diagram on the right supposed to tell us? What has changed since I studied it? I just see that there are more of these points. Unfortunately, I'm not up to…
So one should become omniscient without learning?
ByMocue
The neurons in the brain all communicate with each other through their contact points, the synapses. These are capable of changing the strength of their communication with other cells depending on their use. Certain connections can be weakened, while others can be expanded and strengthened. Connections are formed in the brain when you learn something….
Siamese twins are like-sex, as they are single twins, that is, the egg has been fertilized by a sperm and has then divided so that not only 1 but 2 embryos are formed.
However, these two embryos have not completely detached from one another, so that they have grown together at one (or more) point(s).
Siamese Zwills are always unique. They arise if this fertilized egg has not completely separated. However, since they were formed from the same egg and seed cell, single twins always have the same genetic facilities and therefore also the same sex.
because they are one. in the case of two eggs, there is no siamese symptom
Yes exactly they arise from the same egg therefore also the same sex
It is a double cell division at the wrong time, there are not two fertilized eggs.
because there are always one twins
because there are always one twins
Because they’re single twins.
l single twins have always been the same