45. The glomerulus of the nephron is a. b. A tubular structure with variable per

Question

45. The glomerulus of the nephron is a. b. A tubular structure with variable permeability A series of connected air filled spaces of capillarslunte which then d. Filters protein into the filtrate which then becomes urine 46. Which of the following is NOT considered a function of the respiratory system? a. Regulation of acid-base balance b. Production of sound c. Filtering inspired air d. Transport of oxygen and carbon dioxide to tissue cells e. Intake of oxygen and elimination of carbon dioxide 47. During normal resting pulmonary ventilation, all of the following are true, EXCEPT a· The phrenic nerve stimulates contraction of the diaphragm b. Intrapleural pressure increases above atmospheric pressure during exhalation c. Air comes in during inspiration because alveolar pressure falls below atmospheric pressure d. Thoracic volume increases when the diaphragm contracts during inspiration 48. Which of the following muscles help increase the size of the thoracic cavity during normal inspiration a. External oblique b. Intercostals c. Internal oblique d. Latissimus dorsi e. Pectoralis major 49. Oxygen saturation is a. Typically 75% in arterial blood b. The amount of attachment of oxygen to the heme groups of the hemoglobin molecule c. The same as the hemoglobin concentration of the blood d. Inversely proportional to carbon dioxide saturation 50. Which of the following lists the structures in the correct order of air flow? a. Trachea, laryngopharynx, nasopharynx, oropharynx, larynx b. Naopharynx, oropharynx, laryngopharynx, trachea, larynx c. Nasopharynx, oropharynx, laryngopharynx, larynx, trachea d. Oropharynx, laryngopharynx, nasopharynx, larynx, trachea l. The function of surfactant is to a. Help control what passes between squamous epithelial cells and the alveoli b. Decrease the surface tension, therefore increase lung compliance c. Increase surface tension, therefore increase lung compliance d. Produce mucus and phagocytize bacteria in the upper respiratory system

Explanation / Answer

45 composed of capillaries

46 d. transport of oxygen and carbondioxide fto tissue cells

47 intrapleural pressure increases above atmospheric pressure during exhalation

48 intercoastal muscle

49 the amount of ttachment of oxygen to the haeme groups of the haemoglobin molecule

50 c. nasopharynx, oropharynx,laryngopharynx,larynx,trachea

51 decraese surface tension , therefore increase lung compliance

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