| 21. | The "'choroid plexus "'is a plexus of ventricles of the brain.
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| 22. | The choroid itself can be a complex structure, and it may have different layers within it.
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| 23. | They then pierce the sclera, travel between sclera and choroid to reach the iris dilator muscle.
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| 24. | Choroid plexus papilloma occurs in the lateral ventricles of children and in the fourth ventricle of adults.
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| 25. | The liver secretes transthyretin into the blood, and the choroid plexus secretes TTR into the cerebrospinal fluid.
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| 26. | The California encephalitis virus invades the CNS through either the cerebral capillary endothelial cells or the choroid plexus.
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| 27. | This fluid circulates through the brain and spinal cord, and it is produced in the choroid plexuses.
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| 28. | This X-linked disease is characterized by progressive dystrophy of the choroid, retinal pigment epithelium and retina.
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| 29. | It is vital for disease processes such as macular degeneration, retinal neoplasms, choroid disturbances and diabetic retinopathy.
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| 30. | I know frogs have a functional choroid plexus, though, so they may have a BBB as well.
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