Biochemistry Quiz Paper

1. Which of the following statements about the immune system is TRUE? A. Specific immune defenses are innate (pre-existing) B. Non-specific immune defenses are not innate: they are activated by exposure to foreign antigens C. Non-specific immune defenses require involvement of T-cells and B-cells D. Non-specific immune defenses include fever and the body’s inflammatory response E. None of the above 2. Which of the following does NOT occur during inflammatory response? F. Cell lyses by the insertion of MAC (membrane attack complex) into the plasma membrane of microorganisms G. Leukocytosis H. Redness and heat I. Swelling and pain 3. How do complement proteins in the blood plasma help provide immunity?
Bronchoconstriction . Decreased lung compliance . Sympathetic nervous system stimulation of airway smooth muscle . Increase in alveolar surface tension . All the above

27. Most O2 is transported in the blood in what chemical forms? . As O2 molecules dissolved in plasma . Bound to hemoglobin inside erythrocytes . As bicarbonate ion in plasma . None of the above 28. Which of the following changes in blood would INCREASE the amount of O2 released by hemoglobin to body tissue? . Decrease in temperature . Decrease in pH . Decrease in biphophoglycerate (BPG) levels . Both A and C . None of the above
TRUE/FALSE: Choose (A) for True or (B) for False for #29-34 29. Lung compliance describes how easily the lungs can be expanded (A) 30. Sympathetic nervous system stimulation of the bronchioles results in an increase in airway resistance and decrease in airflow (B) 31. Oxygen is more soluble in blood plasma than carbon dioxide (B) 32. When the body is at rest, one pass of the blood through tissue capillaries typically results in 25% of oxygen molecules being released from hemoglobin