Rate the Effectiveness of the Following Barriers at Preventing Substances

question 61

Short Answer

Rate the effectiveness of the following barriers at preventing substances from crossing as either VERY permissive or NOT permissive:
_____ the arachnoid barrier, where CSF drains into the venous return (in the direction of CSF to circulation)
_____ the arachnoid barrier, where CSF drains into the venous return (in the direction of circulation to CSF)
_____ the blood-CSF barrier composed of choroid epithelial cells
_____ the blood-brain barrier composed of endothelial cells
_____ the endothelial cells surrounding vasculature that supplies blood to the circumventricular organs

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Definitions:

Price Elasticity

An assessment of the extent to which the demand or supply of a product shifts following a price adjustment.

Total Amount

The complete sum or quantity of something, often referring to money, goods, or services.

Equilibrium Price

The price at which the quantity of a good or service demanded by consumers equals the quantity supplied by producers, leading to a stable market condition.

Supply Shift

A change in the quantity of a good or service that suppliers are willing and able to sell at a given price, due to factors other than price itself.