Question 1
Which of the following is NOT a risk factor for lung cancer?
◦ smoking
◦ asbestos exposure
◦ radiation
◦ exposure to industrial chemicals
◦ regular exercise
Question 2
Which of the following statements is false?
◦ Hemoglobin functions as a buffer.
◦ Bicarbonate ions tend to diffuse out of red blood cells into the blood plasma.
◦ The movement of molecules go in different directions in the metabolically active tissues and the alveoli.
◦ Carbonic anhydrase is an enzyme that promotes the formation of oxyhemoglobin.
◦ Hemoglobin consists of four polypeptide chains.