1.The functions of the nasal conchae are to enhance the air turbulence in the cavity and to increase the mucosal surface area exposed to air for greater efficiency.

22. THINK:  Which of the following is an appropriate response to carbon monoxide (CO) poisoning? In other words, if the body has a large amount of CO what would be the best measure to take?

7. The loudness of a person’s voice depends on the ________.        

43. Which is the correct symbol for deoxyhemoglobin?

38. This is a common disorder characterized by the temporary cessation of breathing during sleep.

12. Which of the following is NOT a stimulus for breathing?  

4. Tracheal obstruction is life-threatening.

41. The placenta, a vitally important metabolic organ, is made up of a contribution from mother and fetus. Which portion is from the fetus?        

37. The result of polyspermy in humans is ________.        

34. A pregnant woman urinates more often than usual because the uterus compresses the bladder, her metabolic rate and blood volume are increased, and she must also dispose of fetal metabolic wastes.