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Why do you think this change in levels occurs about the oxygen levels as blood passes through the lungs?
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It is the network of organs and tissues that help you breathe. It includes your airways , lungs and blood vessels .
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- why do oxygen levels decrease(a) The partial pressure of CO2 in the lungs can be varied rapidly by the rate and depth of breathing. For example, a common remedy to alleviate hiccups is to increase the concentration of CO2 in the lungs. This can be achieved by holding one’s breath, by very slow and shallow breathing (hypoventilation), or by breathing in and out of a paper bag.Under such conditions, pCO2 in the air space of the lungs rises above normal. Qualitatively explain the effect of these procedures on the blood pH.(b) A common practice of competitive short-distance runners is to breathe rapidly and deeply (hyperventilate) for about half a minute to remove CO2from their lungs just before the race begins. Blood pH may rise to 7.60. Explain why the blood pH increases.(c) During a short-distance run, the muscles produce a large amount of lactic acid (CH2CH(OH)COOH; K2 = 1.38 × 10 –4 M) from their glucose stores. Why might hyperventilation before a dash be useful?The carbonic acid equilibrium is shown below. Exhalation of CO2 by the lungs causes this equilibrium to shift to the ______, which causes the pH of the blood to _______. H+ + HCO3- <=> H2CO3 <=> H2O + CO2 a) left; increase b) left; decrease c) right; decrease d) right; increase
- How will the lungs compensate for an acute rise in the partial pressure of CO2 in arterial blood? (1 Sentence MAX- no more than 10 words)The carbonic acid equilibria are shown below. Tissues that are aerobically active produce CO2. This causes this equilibrium to shift to the ______, which causes the pH of the blood to ______. H+ + HCO3- <--> H2CO3 <--> H2O + CO2 a) right; increase b) right; decrease c) left; increase d) left; decreaseWhen the blood passes through the lungs, CO₂ is expelled and the hemoglobin picks up oxygen. Place the following steps in the correct order (1 = first thing to happen), assuming that it is the decreased [CO₂] during exhalation that initiates the transition. Carbonic anhydrase works to restore the CO₂/bicarbonate equilibrium, reducing the [H+] The T-state is less stabilized. Oxygen binds to the hemoglobin. Protons dissociate from the hemoglobin.
- How do you regulate the amount of oxygen that enters and the amount of carbon dioxide that leaves your body? Which direction are gases moving in the partial pressure gradient, and why are they doing so?How do you control oxygen coming in and carbon dioxide going out of your body? In the partial pressure gradient which way are gases flowing and why?When it comes to carbon dioxide, does it go from the blood to the tissues, or does it move from the tissues to the blood? And, if so, why does it move in this way (using partial pressures)?
- Is the chemical signal that causes the cessation of breath holding a decrease or an increase in CO2 in the blood?Describe what happens in the respiratory system when you run to catch a bus by placing the following in order (#1-7). Consider that the running will have caused an increase in cellular respiration, which results in an increase in CO2 (this is the change in the variable). The increase in CO2 will be detected by the brain, which will ultimately cause an increase in ventilation. Blood CO2 levels increased and O2 levels decreased. Increased ventilation results. Chemoreceptors detect decreased O2 and increased concentration of CO2/decreased pH. Return to normal CO2 and O2 levels. Respiratory centers increases its stimulation of spinal nerves (phrenic and intercostal). Increased frequency and degree of contraction of respiratory muscles. Central and peripheral chemoreceptors stimulate the respiratory centers in the brainstem. Increased cellular respiration in response to the running.If the partial pressure of oxygen in inhaled air was 80 mm Hg instead of 160 mm Hg, what would be the impact on oxygen transport in the body? Be sure to explain this in detail and to be clear about what you think will happen in all parts of the transfer of oxygen throughout the body.