A saltwater fish has difficulty maintaining its levels of...  1.) Oxygen 2.) Ions 3.) water 4.) None of these 5.) All of these

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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A saltwater fish has difficulty maintaining its levels of... 

1.) Oxygen

2.) Ions

3.) water

4.) None of these

5.) All of these 

Expert Solution
Step 1

Unlike freshwater fishes, salt water fishes drink more amount of water. However, the salt from the water is filtered through the gills resulting in deposition of salt. Hence it is difficult to maintain water and ionic level for saltwater fishes.

The temperature and salinity level of water is inversely proportional to the amount of oxygen it can hold. High salinity indicates the less oxygen holding capacity of saltwater. Not only the fish, but also other aerobic organisms consumes oxygen making it even more scarce.

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