Answer :
The effectiveness of the gaseous exchange surface in animals is increased by it being ventilated. This statement is true.
The act of breathing, or ventilation, involves bringing air to and removing it from the alveoli, which serve as the exchange surface.
A strong concentration gradient may be maintained thanks to the flowing blood and ventilated surfaces. This improves efficient communication
Surfaces and bodily organs of multicellular organisms are tailored for material exchange.
Exchange surfaces in both plants and animals work more efficiently when they:
The flattened form of structures like leaves, the alveoli in the respiratory system, and the villi in the digestive system all have a lot of surface area.
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Final answer:
Ventilation improves an animal's gaseous exchange by maintaining a high partial pressure of oxygen in the alveoli, promoting diffusion and thus, gas exchange. A large surface area in body organs further aids in increasing the efficiency of this exchange. This is particularly evident in animals with flow-through respiratory systems, where the largely unidirectional air movement ensures effective respiration.
Explanation:
True. The effectiveness of the gaseous exchange surface in animals is indeed increased by it being ventilated. This is because the process of ventilation, which involves moving air into and out of the alveoli, improves gas exchange. It does this by maintaining a high partial pressure of oxygen in the alveoli which is essential for diffusion, the primary method of gas exchange.
This is further facilitated in animals with flow-through respiratory systems that contain numerous air sacs or alveoli, significantly increasing the total surface area available for gas exchange. The arrangement of the alveoli in the lung maximizes the gas exchange surface area, which helps improve respiration efficiency and oxygen delivery to the body. Similarly, in the flow-through respiratory system, air moves in a largely unidirectional pathway to reach a series of air sacs, offering effective and efficient respiration.
Gas exchange between air and circulating blood occurs across these respiratory surfaces. Oxygen from the air diffuses into the blood, while carbon dioxide in the blood diffuses out into the air. This exchange is driven by differences in partial pressure. Ventilation can alter the composition of gas within the alveoli, leading to a more efficient gas exchange process.
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