Review_Questions_for_EXAM_2fall_10.docx.doc

Review_Questions_for_EXAM_2fall_10.docx.doc - Review...

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Review Questions for EXAM 2 1. A person who has an autoimmune disease that results in decreased levels of aldosterone and insufficient Cortisol levels as well as a “sun-kissed” tan, appears to have ___________. a. Seasonal Affective Disorder b. Cushing’s Syndrome c. Addison’s Disease d. Melanoma 2. Morphine binds to mu opiate receptors producing analgesia. a. True b. False 3. The rapid depolarization stage of an action potential, where the membrane potential changes from -70mV to +30mV, is due to a dramatic increase in membrane permeability to: a. Calcium b. Potassium c. Sodium d. B and C e. A and B 4. During the relative refractory period: a. It is impossible to generate a second action potential no matter how strong the stimulus. b. The membrane potential goes below -70mV c. It is possible to generate a second action potential if the stimulus is strong enough d. B and C e. None of the above 5. Which of the following statements is false? a. Lipophilic messengers have receptors on the cell membrane b. Lipophobic messengers are stored in vesicles prior to release c. Hydrophobic messengers don’t like to dissolve in the cytoplasm d. Hydrophilic messengers can’t pass through the cell membrane 6. Which of the following is an amino acid messenger? a.dopamine b. epinephrine
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c. cholestrol d. glycine 7. In which type of regulation does the target cell decrease the number of receptors for messenger? a. Down Regulation b. Up Regulation 8. What is the chemical class of Insulin? a. Amine b. Steroid c. Peptide d. Amino Acid e. Eicosanoid 9. Tamoxifan acts as an agonist in what type of tissue? a. Vaginal tissue b. Breast tissue 10. A lipophilic messenger 1. Binds to a receptor on the plasma membrane 2. Alters transcription 3. Regulates the rate of exocytosis 4. Is stored in vesicles prior to release 11.Which type of chemical messenger regulates the rate of exocytosis? A. Lipophilic messengers B. Lipophobic messengers 12.Which of the following is not true about the role of Calcium in signal transduction?
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A. Decreases muscle contraction B. Changes electrical properties of cell C. Induces muscle contraction D. Binds to calmodulin
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This note was uploaded on 05/12/2011 for the course BIOL 2160 taught by Professor Kt during the Fall '08 term at LSU.

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Review_Questions_for_EXAM_2fall_10.docx.doc - Review...

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