The Countercurrent Exchange System Found in Fish Gills Maximizes Gas

question 11

Multiple Choice

The countercurrent exchange system found in fish gills maximizes gas exchange efficiency by:

• A) producing rapid water flows across the gill surface.
• B) allowing water and blood to come in direct contact to maximize oxygen exchange.
• C) having a high concentration gradient of oxygen at the start of the capillaries.
• D) maintaining a high concentration gradient of oxygen along the entire length of capillaries.
• E) decreasing the oxygen content of the blood leaving the gill filaments.

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Definitions:

Oliguria

A medical condition defined by the production of abnormally small amounts of urine, often indicating renal issues.

Intravenous Fluid

A liquid substance directly injected into a vein to provide essential nutrients or medication, or to maintain hydration.

Bladder Distension

Bladder distension occurs when the bladder is overly filled and cannot properly empty, leading to discomfort and possible urinary complications.

Urinary Incontinence

The loss of bladder control, leading to the accidental leakage of urine.