Why Does Countercurrent Exchange Optimize Gas Exchange Across Some Gills

question 46

Multiple Choice

Why does countercurrent exchange optimize gas exchange across some gills?

• A) It sustains an optimal thermal environment for gas exchange.
• B) It optimizes perfusion to the respiratory surface.
• C) It sustains an optimal respiratory gas concentration gradient, allowing diffusion to occur across the entire respiratory surface.
• D) It optimizes delivery of the respiratory medium to the respiratory surface.
• E) It minimizes the area of diffusion.

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Definitions:

Internal Rate of Return (IRR)

A financial metric used to estimate the profitability of potential investments.

Cost of Capital

The rate of return a company must earn on its investment projects to maintain its market value and attract funds.

Discount Rate

The interest rate used in discounted cash flow analysis to determine the present value of future cash flows.

Net Present Value (NPV)

The variance between the current value of incoming cash and the current value of outgoing cash throughout a specific duration.