A Jellyfish Relies on Diffusion to Provide Oxygen to Its

question 74

Multiple Choice

A jellyfish relies on diffusion to provide oxygen to its body cells, and yet it is much larger than the 1 cm limit imposed by diffusion. How can it be so thick and still meet its metabolic demands by diffusion alone?

• A)Much of the thickness of a jellyfish consists of metabolically inert materials that do not require oxygen.
• B)Jellyfish have specialized tubular cells that facilitate the movement of oxygen throughout the body.
• C)The layers of metabolically active tissue are very thick and highly folded, which provides a large surface area for diffusion.
• D)Jellyfish maintain a very large concentration gradient for oxygen across their body tissues.
• E)Water makes up most of the body of a jellyfish, and oxygen diffuses more rapidly in water than in tissues.

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