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Blood-aqueous barrier

Blood-aqueous barrier

The anatomical mechanism that prevents exchange of materials between the chambers of the eye and the blood. The tight junctions of the nonpigmented epithelium of the ciliary body, the junctions of the iris tissues, and iris blood vessels constitute the blood-aqueous barrier. Lipid-soluble substances such as oxygen and carbon dioxide penetrate the barrier at a high rate. Sodium, larger water-soluble ions, proteins, and other large and medium-sized molecules are restricted.


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Sperm Immunity of Womens

... must exist in this organ to prevent any autoimmune reaction. The blood-testis barrier is likely to contribute to the survival of sperm. However, it is believed in the field ...

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by ankitaalive
Wed Nov 28, 2012 6:28 am
 
Forum: Cell Biology
Topic: Sperm Immunity of Womens
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Views: 2258

How do T4 cells enter the brain?

... organs (CVO) are specialized areas of the brain that lack a normal blood-brain barrier, and therefor are in constant contact with signaling molecules circulating in the bloodstream. ...

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by anastasianikifor
Thu Aug 26, 2010 11:35 am
 
Forum: Cell Biology
Topic: How do T4 cells enter the brain?
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Views: 3547

How do T4 cells enter the brain?

... HIV can enter the brain through T4 cells, since they cannot pass the Blood Brain Barrier. However, they are able to do so through macrophages. That being said, I am currently ...

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by Ewokboba
Thu Jul 15, 2010 2:53 am
 
Forum: Cell Biology
Topic: How do T4 cells enter the brain?
Replies: 2
Views: 3547

Re:

There's a placental barrier between the mother and the fetus, so not everything that's in the mother's blood can pass to the fetus. Sorry, I shall be more specific, 'all low-molecular substances can pass' basically

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by JackBean
Fri Sep 25, 2009 8:30 am
 
Forum: Physiology
Topic: Antimuscarinic drugs
Replies: 3
Views: 5220

Antimuscarinic drugs

There's a placental barrier between the mother and the fetus, so not everything that's in the mother's blood can pass to the fetus. Mostly the transport happens via diffusion, so particles that can passively pass ...

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by biohazard
Fri Sep 25, 2009 6:41 am
 
Forum: Physiology
Topic: Antimuscarinic drugs
Replies: 3
Views: 5220
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