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human physiology study questions 28

human physiology study questions 28 - normal besides...

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27:130 LECTURE 28 Study Questions 1. Match the following observed conditions with the appropriate type of hypoxia. (NOTE: several conditions may correspond to the same type of hypoxia). I. The patient has a mutation in their hemoglobin protein sequence, which reduces affinity of Hb to oxygen. II. Angiography showed the presence of severely narrowed artery supplying the liver. III. The airways of the lungs were blocked by a piece of food. IV. A patient poisoned himself with alcohol. 1. Ischemic hypoxia. 2. Anemic hypoxia. 3. Histotoxic hypoxia. 4. Hypoxic hypoxia. a) I - 2, II - 4, III - 1, IV - 3. b) I - 2, II - 1, III - 4, IV - 3. c) I - 4, II - 1, III - 3, IV - 3. d) I - 3, II - 3, III - 4, IV - 2. e) None of the above is correct. 2. By mistake, an expired blood plasma pack was used for transfusion into a patient. Everything in it was
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Unformatted text preview: normal besides slightly lower pH. What could be the consequences in respect to respiration? a) Peripheral and central chemoreceptors will decrease firing frequency, eventually decreasing ventilation b) Peripheral and central chemoreceptors will increase firing frequency, eventually increasing ventilation. c) There will be no change in respiration. d) Peripheral chemoreceptors will increase firing frequency, which will lead to an increase in ventilation. e) All above answers are incorrect. Correct answers: 1. b. 2. d. Central chemoreceptors are sensitive to pH in the brain extracellular fluid due to diffusion of CO2 (not the hydrogen ions) through blood brain barrier....
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