In Fish, Countercurrent Exchange Involves Water Flowing Over Gills and Blood

question 23

Multiple Choice

In fish, countercurrent exchange involves water flowing over gills and blood flowing through gill capillaries in opposite directions. This increases gas exchange by creating a(n) ____.

• A)larger surface area
• B)osmotic gradient
• C)concentration gradient
• D)reservoir for gas
• E)source of new hemoglobin

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Definitions:

Efficient Operations

Activities and processes designed to achieve maximum productivity and minimize waste, enhancing the overall effectiveness of a business or organization.

Savings Accounts

Bank accounts that earn interest over time, allowing individuals to save money for future use.

Checking Accounts

Bank accounts that allow for easy access to funds through checks, debit cards, and electronic transfers.

Cash Equivalents

Cash equivalents are highly liquid investment securities with maturities of three months or less, making them almost as liquid as cash itself.