What would happen if human blood becomes acidic ? Oxygen-carrying capacity of haemoglobin is increase Oxygen-carrying capacity of haemoglobin is decrease Will remain same Will be unpredictable
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What would happen if human blood becomes acidic ?
- Oxygen-
carrying capacity of haemoglobin is increase - Oxygen-carrying capacity of haemoglobin is decrease
- Will remain same
- Will be unpredictable
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- Vital capacity is the _______. a. amount of hemoglobin in a red blood cell b. amount of time a person can hold his or her breath c. maximum amount of air a person can move in and out with one breath d. amount of oxygen in an exhalationAfter oxygen diffuses into lung capillaries, it also diffuses into _______ and binds with _______. a. tissue fluid; red blood cells b. tissue fluid; carbon dioxide c. red blood cells; hemoglobin d. red blood cells; carbon dioxideSmoking and Lung Function Data from the Coronary Artery Risk Development in Young Adults (CARDIA) study was used to assess the effects of smoking on lung function. In 1985--86, the study enrolled about 5,000 people aged 18 to 30 years old in a long term study. Over the next 20 years, study subjects were periodically asked about their habits and their health, including their lung function, was assessed. FIGURE 38.19 is a model based on data from this study, of how lifetime tobacco and marijuana use affects forced expiration. FIGURE 38.19 Associations between marijuana or tobacco smoking and the change in forced expiration volume (FEV). One joint-year means an average of one joint smoked daily for one year. One pack-year is an average of one pack smoked per day for one year. Dots at the top of the graph show the distribution of observations. Lines below show the modeled association. Blue is marijuana and black is tobacco. The change in FEV1 is given as milliliters of air. Relatively few people had the highest level of lifetime marijuana exposure. How might additional data from such users alter the model?
- Smoking and Lung Function Data from the Coronary Artery Risk Development in Young Adults (CARDIA) study was used to assess the effects of smoking on lung function. In 1985--86, the study enrolled about 5,000 people aged 18 to 30 years old in a long term study. Over the next 20 years, study subjects were periodically asked about their habits and their health, including their lung function, was assessed. FIGURE 38.19 is a model based on data from this study, of how lifetime tobacco and marijuana use affects forced expiration. FIGURE 38.19 Associations between marijuana or tobacco smoking and the change in forced expiration volume (FEV). One joint-year means an average of one joint smoked daily for one year. One pack-year is an average of one pack smoked per day for one year. Dots at the top of the graph show the distribution of observations. Lines below show the modeled association. Blue is marijuana and black is tobacco. The change in FEV1 is given as milliliters of air. Based on this model, how would smoking two packs of cigarettes a day for 20 years (40 pack-years or exposure) affect FEV1? What level of marijuana smoking would produce an equivalent effect?In______, gas exchange occurs at the body surface and gas is distributed by diffusion alone. a. earthworm c. frogs b. flatworms d. insectsWhich of the following are most closely associated with oxygen transport? (a) red blood cells (b) platelets (c) neutrophils (d) basophils (e) lymphocytes
- Which of the following carries oxygento various parts of human body?A. Red blood cellsB. White blood cellsC. PlasmaD. NervesTo trigger bronchodilation, the PO2 in the blood should be low PO2 in the lungs should be high. PCO2 in the lungs should be high. pH levels in the red blood cells should be high. PCO2 in the blood should be low.oxygen binding to hemoglobin has what affect on additional molecule of oxygen binding to the dame molecule of hemoglobin? a. decreases teh binding of more oxygen to that molecule of hemoglobin. b. increases the binding of more oxygen to that molecule of hemoglobin. c. has no effect on the ninding ofm ore oxygen to that molecule of hemoglobin d. this is a trick question becuase only one oxygen can bind to a molecule of hemoglobin.
- A molecule of hemoglobin ________.a. is shaped like a biconcave disk packed almostentirely with ironb. contains four glycoprotein units studded withoxygenc. consists of four globin proteins, each bound to amolecule of hemed. can carry up to 120 molecules of oxygenA given amount of blood have 19% O2 measured at 0 °C and 1.0 atm. Hemoglobin in the blood can carry up to four molecules of O2. Calculate how many molecules of hemoglobin is present in 1.0 L of blood.Why does Fe2+ not fit perfectly into the center hemoglobin's heme pocket, while Fe3+ does ift perfectly into center hemoglobin's heme pocket? A) Fe2+ has a larger effective nuclear charge than Fe3+ . B) Fe2+ is to reactive to stably fit into hemoglobin's heme pocket. C) Fe2+ had a wrinkled shirt D) Fe2+ is repelled by the heme's coordinating nitrogens E) Fe3+ is denser and has a smaller ionic radius than Fe2+