The Blood-Brain Barrier

question 130

Multiple Choice

The blood-brain barrier

• A) permits passage of foreign substances from the blood to the neurons.
• B) prohibits the transport of amino acids and glucose to the neurons.
• C) prohibits the removal of waste materials from the neurons.
• D) protects neurons from toxic substances in the blood.
• E) does not prevent fluctuations in the composition of the blood from affecting the functions of the brain.

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Definitions:

PE Ratio

The price-to-earnings ratio, a valuation metric that compares a company's stock price to its earnings per share.

Stock Repurchase

A company's buying back of its own shares from the marketplace, which can reduce the number of outstanding shares and potentially increase the stock value.

Stock Dividend

A payment made by a corporation to its shareholders in the form of additional shares, rather than cash.

Earnings Per Share

A company's profit divided by the outstanding shares of its common stock, showing the portion of a company's profit allocated to each share of stock.