NURSING EXAM QUESTIONS
NUTRITION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It allows gas to move through the leaf
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It transports water
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It transports sugars
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It is where photosynthesis happens
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Detailed explanation-1: -The spongy mesophyll’s function is to allow for the interchange of gases (CO 2) that are needed for photosynthesis. The spongy mesophyll cells are less likely to go through photosynthesis than those in the palisade mesophyll.
Detailed explanation-2: -The cells in the spongy mesophyll layer are not as closely packed as the cells in the palisade mesophyll layer. This creates air spaces inside the leaf to enable gases to move in and out.
Detailed explanation-3: -Gas exchange The spongy mesophyll cells are covered by a thin layer of water. Gases dissolve in this water as they move into and out of the cells. When the plant is photosynthesising during the day, these features allow carbon dioxide to diffuse into the spongy mesophyll cells, and oxygen to diffuse out of them.
Detailed explanation-4: -Spongy layer Although they contain a few chloroplasts, their main function seems to be the temporary storage of sugars and amino acids synthesized in the palisade layer. They also aid in the exchange of gases between the leaf and the environment.