. If the alveolar surface were spread out, It would cover about 80 m2.

1.	. If the alveolar surface were spread out, It would cover about 80 m2. Howdo you think the surface area of your body is? Consider how efficient exeof gases becomes because of the large surface available for the exchangsplaceIf diffusion were to move oxygen in our body. It iyears for a molecule of oxygen to get to our toes from our hings. Arentthat we have hacmoglobin?.s estimated that it wouldQ U E S T IO N S. What advantage over an aquatic organism does a terrestrial orpanismhave with regard to oblaining oxygen for respiration?What are the different ways in which glucose is oxidised to provideenergy in various organisms?2.
Answer» 1. Terrestrial organisms take up oxygen from the atmosphere whereas aquatic animals obtain oxygen from water. Air contains more O2 as compared to water. Since the content of O2 in air is high, the terrestrial animals do not have to breathe faster to get more oxygen. Therefore, unlike aquatic animals, terrestrial animals do not need adaptations for gaseous exchange. 2. Breaking down of glucose involves two processes. In the first step, it is broken into three carbon molecules called pyruvate. The pyruvate is further broken down into energy in following different ways in various organisms.i)Aerobic respiration :In this case pyruvate is broken down into water and carbon dioxide along with release of energy. It commonly occurs in mitochondria of cells.ii)Anaerobic respiration in yeast :In yeast cells during fermentation pyruvate is converted into ethanol and C02 in the absence of 02.3)Anaeorbic respiration in muscles: Due to lack of oxygen, eg. during vigorous running or exercise, in human muscles, pyruvate is converted to lactic acid. Like my answer if you find it useful!

. If the alveolar surface were spread out, It would cover about 80 m2. Howdo you think the surface area of your body is? Consider how efficient exeof gases becomes because of the large surface available for the exchangsplaceIf diffusion were to move oxygen in our body. It iyears for a molecule of oxygen to get to our toes from our hings. Arentthat we have hacmoglobin?.s estimated that it wouldQ U E S T IO N S. What advantage over an aquatic organism does a terrestrial orpanismhave with regard to oblaining oxygen for respiration?What are the different ways in which glucose is oxidised to provideenergy in various organisms?2.

Answer»

1. Terrestrial organisms take up oxygen from the atmosphere whereas aquatic animals obtain oxygen from water. Air contains more O2 as compared to water. Since the content of O2 in air is high, the terrestrial animals do not have to breathe faster to get more oxygen. Therefore, unlike aquatic animals, terrestrial animals do not need adaptations for gaseous exchange.

2. Breaking down of glucose involves two processes. In the first step, it is broken into three carbon molecules called pyruvate. The pyruvate is further broken down into energy in following different ways in various organisms.i)Aerobic respiration :In this case pyruvate is broken down into water and carbon dioxide along with release of energy. It commonly occurs in mitochondria of cells.ii)Anaerobic respiration in yeast :In yeast cells during fermentation pyruvate is converted into ethanol and C02 in the absence of 02.3)Anaeorbic respiration in muscles: Due to lack of oxygen, eg. during vigorous running or exercise, in human muscles, pyruvate is converted to lactic acid.

Like my answer if you find it useful!

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