When There Is Excess Na⁺ in the Body

question 86

Multiple Choice

When there is excess Na⁺ in the body

• A) The plasma volume is expanded, and arterial blood pressure is increased.
• B) As a compensatory measure, the GFR is increased.
• C) As a compensatory measure, aldosterone secretion is increased to increase the amount of Na⁺ reabsorbed.
• D) The plasma volume is expanded and arterial blood pressure is increased, and as a compensatory measure, the GFR is increased.
• E) All of these.

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Definitions:

Marginal Cost

The price of creating one more unit of a product or service.

Purely Competitive Market

A market structure with many buyers and sellers, where all firms sell identical products and no single buyer or seller can influence the market price.

Economic Profit

The discrepancy between a firm's gross income and its total expenses, factoring in both clear and unclear costs.

Profit-Maximizing Output

The level of production at which a firm achieves the highest possible profit, where marginal cost equals marginal revenue.