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Neurones

neurone --> neuron

An excitable cell specialised for the transmission of electrical signals over long distances. Neurons receive input from sensory cells or other neurons and send output to muscles or other neurons. Neurons with sensory input are called sensory neurons, neurons with muscle outputs are called motoneurons, neurons that connect only with other neurons are called interneurons. Neurons connect with each other via synapses. Neurons can be the longest cells known, a single axon can be several metres in length. Although signals are usually sent via action potentials, some neurons are nonspiking.


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Re: blood brain barrier

... brain endothelial cells. 3. Brain capillaries are in contact with foot processes of astrocytes which essentially separate the capillaries from the neurones.

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by lipoflorida
Fri Jun 19, 2009 10:05 am
 
Forum: Physiology
Topic: blood brain barrier
Replies: 2
Views: 741

Substintia Nigra

Neuromelanin is an anti-oxidant. It helps protect the neurones from reactive oxygen species like superoxides and peroxides :)

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by Katy_Bobbles
Tue Apr 29, 2008 4:35 pm
 
Forum: Human Biology
Topic: Substintia Nigra
Replies: 3
Views: 878

Re: Are tissues in the body capable of sensing pain?

... to be quite near these tissues if they are not in the group as such)? receptors in the skin respond to damage/inflammation to activate sensory neurones...

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by Revenged
Fri Dec 28, 2007 12:18 am
 
Forum: Human Biology
Topic: Are tissues in the body capable of sensing pain?
Replies: 24
Views: 2240

Re: On Calcium mediated exocytosis and the synaptotogmin fam

... for calcium mediated exocytosis can occur in diffferent ways... 1) Opening of sodium channels - e.g. which as you said occurs in presynpatic neurones and results in neurotransmitter release 2) Closure of potassium channels... e.g. in the beta cells of the pancreas.... - glucose enters -> ...

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by Revenged
Mon Jul 09, 2007 10:40 am
 
Forum: Cell Biology
Topic: On Calcium mediated exocytosis and the synaptotogmin family
Replies: 3
Views: 825

Unbeatable Model of Human Consciousness

... but as a non-algorithmic device. This is possibly the best theory around today to explain consciousness. The model states that organelles in the neurones called microtubules (like hollow drainpipes) in the parts of the neurones called dendrites are resposible for the final output from a brain; ...

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by Heronumber0
Sat Jul 07, 2007 7:15 pm
 
Forum: General Discussion
Topic: Unbeatable Model of Human Consciousness
Replies: 0
Views: 451
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