0
The blood-brain barrier (BBB) is a diffusion barrier, which impedes influx of most compounds from blood to brain. Three cellular elements of the brain microvasculature compose the BBB-endothelial cells, astrocyte end-feet, and pericytes (PCs). Tight junctions (TJs), present between the cerebral endothelial cells, form a diffusion barrier, which selectively excludes most blood-borne substances from entering the brain. Astrocytic end-feet tightly ensheath the vessel wall and appear to be critical for the induction and maintenance of the TJ barrier, but astrocytes are not believed to have a barrier function in the mammalian brain. Source: http://www.citeulike.org/user/superpyrin/article/1061013
Tissue capillaries
Wiki User
∙ 8y ago
Wiki User
∙ 14y agoBlood brain barrier is formed by specific nueroglial cells called astrocytes.These astrocytes are of two types :1) Fibrous astrocytes and 2) protoplasmic astrocytes. The fibres of these astrocytes forms a network with capillaries of blood vessels that supply blood to brain . This network of fibres forms a barrier between blood medium and brain tissue for the purpose of maintaining " homeostasis" . How it maintains homeostasis ? Actually: 1) lipid soluble molecules only can enter throgh blood brain barrier easily wiyhout any carrier milecules . 2)but water soluble molecules like sodium , potasium enter by presence of specific carrier molecules only 3) some substances cannot cross blood brain barrier.By this way this barrier maintains homeostasis.
Wiki User
∙ 9y agoThe function of the blood-brain barrier is to allow water, lipid soluble molecules, and gases into the brain extracellular fluid. The barrier also lets in molecules that are necessary for neural function such as amino acids and glucose.
Wiki User
∙ 9y ago- Protects the brain from "foreign substances"in the blood that may injure the brain.
- Protects the brain from hormones and neurotransmitters in the rest of the body
Wiki User
∙ 11y agoEndothellal cells of blood vessels (capillaries) in the choroid plexus and ependymal cells are joined by tight junctions to form the BBB of the brain.
Wiki User
∙ 12y agoBlood, Brain, and a Barrier.
Wiki User
∙ 11y agored liqid
Add your answer:
Earn +20 pts
What does the Blood Brain Brarrier do?
The blood brain barrier is actually a physical barrier (made of tight junctions of cells/capillaries) that provides a filtering mechanism for the blood carrying stuff to the brain and spinal cord. It only allows certain things to get in and out of the brain and spinal cord.
Blood made by what?
Most of the components of blood are made in the bone marrow.
What is the tissues of the brain?
Brain tissues are made of neurons (cells) which together form nervous tissue.The brain is made of neurons, which are long, thin cells with tentacles that can be up to a meter long. There are also up to 50 billion other non-neural cells, such as cells that line the BBB [the blood brain barrier, which prevents encephalitis, or infection and subsequent inflammation of the brain].
What type of tissue is the brain made of?
Brain tissues are made of neurons (cells) which together form nervous tissue.The brain is made of neurons, which are long, thin cells with tentacles that can be up to a meter long. There are also up to 50 billion other non-neural cells, such as cells that line the BBB [the blood brain barrier, which prevents encephalitis, or infection and subsequent inflammation of the brain].
Does your blood come from your bone marrow?
Not all the blood components. The red blood cells are made in the bone marrow.
Blood is made of which of the following two components plus?
cells and plasma
How do you made body blood?
With Some Brain Cells, nice spelling.
What are the four different things that blood is made up of?
Some of the components of blood are: Red blood cells, White blood cells, Platelets, Plasma, Immunoglobulins.
Is there a sunscreen made to put on your scalp?
In general there's no specific need for a different type of sunscreen. The only real precaution you might want to consider is using one based on micronized titanium to decrease any chance of chemicals penetrating the blood brain barrier.
Is all human blood same?
All human blood is the same in terms of the components it is made up of. The only differences are the different types.
How many liters of blood is in the brain?
wtf made you think of that? anyway there is 6 litres in the whole body, im not sure about the brain
Is the brain made out of anything besides nervous tissue?
You have the the other type of cells in the brain. You have the insulating cells in your brain, so that short circuits should not take place in your brain. You have also the blood vessels in your brain.
