Bio12.HW.packet1 (1).docx

Bio12.HW.packet1 (1).docx

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Homework packet unit one- Human Physiology Name: I. Multiple Choice. Select the letter corresponding to the best selection for each question. Where indicated in the question , some of the following questions may have multiple correct answers requiring more than one letter to be selected. 1. A patient presents with all the symptoms of hypothyroidism. Blood tests show elevated plasma TRH but depressed plasma TSH and TH. The etiology (source of the problem) is the__( a-c)__, which is __( d-e)___. A. hypothalamus B. thyroid C. adenophyphysis D. oversecreting E. undersecreting F. G. 2. The reason plasma TRH levels are elevated, in the question above, is ___the TRH-secreting gland. a) failure of positive feedback mechanisms to stimulate b) overstimulation by positive feedback mechanisms of c) failure of negative feedback mechanisms to inhibit d) overinhibition by negative feedback mechanisms of H. I. 3. Graves Disease is an autoimmune disorder; antibodies stimulate the thyroid gland. In this case, we’d expect a) elevated TH, elevated TSH, elevated TRH b) elevated TH, depressed TSH, depressed TRH c) depressed TH, elevated TSH, elevated TRH d) depressed TH, depressed TSH, elevated TRH e) none of the above f) ___________________________________________________ g) More than one choice may be correct. Choices may be used more than once. h) a) Pernicious/megalobastic anemia b) Sickle Cell anemia c) Thalassemia i) d) Iron deficiency anemia e) Aplastic Anemia j) 4. Cooley’s anemia 5. megaloblastosis 6. gastric atrophy 7. erythropoietic failure 8. hereditary, genetic defect, valine 9. hereditary, genetic defect, failure to make one type of globin chain k) l) Select one from the choices (a-e) for each of the following. Choices may be used more than once. m) a) tyrosine b) thymidine c) thyroglobulin d) uracil e) thyroxine ab) T3 10. in RNA 11. also known as T4 12. Nucleoside that should be in DNA 13. amino acid 14. colloidal protein, storage molecule 15. nucleotide when found in DNA is considered to be "damage" 16. ______________________________________________________________________________ 16. HbF has an oxygen affinity that is ____ that of HbA. In the absence of any globin chains, heme’s affinity for oxygen would be excessively____. a) Less than, high b) Less than, low c) Higher than, high d) Higher than, low 1
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17. The cellular role of vitamins is to 2
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a) act as cofactors b) act as apoenzymes c) act as coenzymes d) act as substates for enzyme reactions e) provide cellular metabolic energy f) 18. Which of the following statements is true? a) Persons with malaria are unable to inherit sickle cell traits. b) Persons with sickle cell disease are immune to malaria. c) Persons with malaria are resistant to sickle cell disease. d) Persons with sickle cell trait are resistant to malaria. e) 19. The event that triggers erythrocyte sickling in HbS is a) Reproduction of parasite within the erythrocyte b) Low oxygen pressure at the erythrocyte c) Contraction of malaria d) Being bitten by the mosquito e) Parasite entering the erythrocyte f) 20. Which one of the following statements about the reticulocyte is false ?
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