The BBB Functions to Prevent Unwanted Molecules from Entering the Brain

question 29

Multiple Choice

The BBB functions to prevent unwanted molecules from entering the brain tissues, by which of these mechanisms?

• A) requiring all molecules that pass through to use either a carrier or transport protein
• B) selectively allowing some water-soluble molecules pass through with the help of proteins
• C) selectively allowing some lipid-soluble molecules pass through with the help of proteins
• D) requiring lipid-soluble molecules to use either a carrier or transport protein

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Definitions:

Surplus II

An excess of production or supply over demand, leading to potential wastage or decrease in prices.

Total Surplus

The total benefits society gains, encompassed by the addition of consumer surplus and producer surplus within a market.

Consumer Surplus

The variation between the sum consumers are willing to allocate for a good or service and the sum they actually allocate.

Surplus II

An additional amount of a resource, product, or service that exceeds the amount demanded or utilized.