3. Name the vessels (in the correct sequence) that O2 travels in during transpor
ID: 207616 • Letter: 3
Question
3. Name the vessels (in the correct sequence) that O2 travels in during transport 4. Describe what happens to oxygen during internal respiration. Which structures does it cross? 5. What happens to O2 during cellular respiration? What is produced? 6. What is the relationship between CO2 and cellular respiration? 7. Describe what happens to CO2 during internal respiration. Which structures does it cross? 8. Name the vessels (in the correct sequence) that CO2 travels in during transport. 9. Describe what happens to CO2 during external respiration. Which structures does it cross? 10. What is the pathway of CO2 in ventilation? How is it different from the pathway that oxygen takes?Explanation / Answer
Answer 3:- Oxygen is transported throughout the body by the blood. Only 2% of oxygen is present in the blood plasma, 98% of the oxygen is bound to the haemoglobin present in the red blood cells. The blood vessels that take part in transport of oxygen are as given below.
The oxygen enters the fine capillaries present in the walls of alveoli. The fine capillaries collect the oxygenated blood in to the pulmonary vein. The pulmonary vein transfers the blood to left atrium, from which it enters left ventricle. Left ventricle pumps the oxygenated blood into the aorta. Aorta is the major artery, which later on subdivides into systemic arteries. The systemic arteries divide to form capillaries that can reach cells and tissues in order to supply oxygen to all tissues.
Answer 4:- Internal respiration occurs at the tissue site. Oxygen that reaches the tissue through capillaries diffuses into the cells from the capillaries and the carbon dioxide from the cells diffuses out of the cell into the capillaries. The structures that the oxygen needs to cross in order to diffuse into the cells are erythrocyte (red blood cell) membrane, blood capillary wall and cell membrane.
Answer 5:- The three major processes that take place during cellular respiration are – glycolysis, kreb’s cycle and electron transport chain. Oxygen acts as electron acceptor in electron transport chain. In cellular respiration a cell uses 6 oxygen molecules to break down one molecule of glucose. The products formed by this reaction are the carbon dioxide and water and energy is generated.
Answer 6:- Carbon dioxide is the byproduct formed during the breakdown of glucose by oxygen to produce energy. Thus, carbon dioxide is one of the products of the cellular respiration.
Answer 7:- Internal respiration occurs at the tissue site. Carbon dioxide from the cells diffuses out of the cell into the capillaries. The structures that the carbon dioxide needs to cross in order to diffuse into the cells are cell membrane and blood capillary wall.
Answer8:- The carbon dioxide enters the capillaries at the tissue site. These capillaries collect the blood in systemic veins. The systemic veins collect the blood in superior venacava and inferior venacava. The superior and inferior venacava transports the carbon dioxide present in the blood to right atrium from which it enters right ventricle. Right ventricle pumps the carbon dioxide containing blood into the pulmonary arteries. Pulmonary arteries form capillaries in the lung. These capillaries surround the walls of alveoli where carbon dioxide is exchanged.
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