PASS kine 3012 prac Mid 1 (no asnwers)

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York University *

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3012

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Biology

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Apr 3, 2024

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1. Which of the following is true? a. Intrapleural fluid gives the lungs lubrication when moving against the thoracic wall b. The visceral pleura attaches to the thoracic wall c. The visceral pleura and parietal pleura are attached to one another d. Parietal pleura attaches to the alveoli e. 2 of the above are true 2. Which of the following is true regarding the lungs? a. Pulmonary veins bring oxygenated blood that comes from the lungs, back to the heart b. Lung tissue contains lots of smooth muscle c. Lungs contain systemic capillaries that are responsible for gas exchange with the alveoli d. The lung is sealed air tight with the thoracic cavity e. 2 of the above are true 3. Which of the following is not an assumption in homeostatic control? a. Some alterations in set points are more important than others b. Set points are kept within a tight range c. A sensor is required to sense changes in set point d. Our body tends to favor positive feedback over negative feedback e. All of the above are assumptions in homeostatic control 4. Which of the following muscles is not responsible for expiration? a. Rectus abdominis b. Internal intercostals c. Abdominal obliques d. Parasternal intercostals e. All of the above are responsible for expiration 5. An individual with an autoimmune disease that impairs the production of alveolar surfactant would have which characteristics? a. Difficulty with expiration b. An increase in surfactant production c. Decrease in compliance d. Dysregulation of surface tension within alveoli e. 2 of the above are true

6. Which of the following is true? a. Conducting zone begins in the bronchi b. Trachea is lined with smooth muscle c. The conducting zone has cilia that lines the outside of the airway d. None of the above are true 7. The alveoli are able to stay open due to a. Intrapleural pressure is greater than transpulmonary pressure b. Pressure difference between alveolar and atmospheric pressure c. Intrapleural pressure being less than alveolar pressure d. Atmospheric pressure being able to overcome the recoil of the lungs e. 2 of the above are true 8. A container had a volume of 5 L and a pressure of 3.5 mmHg. If the volume were to increase to 8 L, what would the pressure be? (ROUND THE ANSWER) a. 140 mmHg b. 2 mmHg c. 17 mmHg d. 3 mmHg e. 1 mmHg 9. What subdivision of lung volume would the blue X represent? a. Functional residual capacity b. Reserve volume c. Residual volume d. FEV1 e. Tidal volume 10. 2 alveoli are present. Alveoli A has a radius of 4 and alveoli B has a radius of 8. Surface tension is 2 when no surfactant is present. Which of the following is true? a. Air is distributed equally to both alveoli b. Air will flow from alveoli A to alveoli B c. Pressure in alveoli A will increase if surfactant is added d. Air will flow from alveoli B to alveoli A e. 2 of the above are true 11. Which of the following is true regarding feedback? a. A decrease in ventilation when CO2 concentration (in arterial blood) is low would be an example of negative feedback b. An example of positive feedback is salivating at the smell of food c. Feedback regulation lowers blood pH to below 5.5 d. Feedforward regulation is a form of feedback that occurs during childbirth e. Positive feedback is responsible for maintaining homeostasis

Using the information provided solve for questions 12-15 Vd = 0.125 L f= 14 TLC = 6.5 L IRV= 2 L VC= 5.2 L ERV= 2.71 L 12. Based on the values given calculate Vt a. 1790 ml b. 0.49 ml c. 490 ml d. 710 ml 13. Based on the values given calculate VE a. 6860 ml b. 5110 ml c. 6990 ml d. 4456 ml 14. Based on the values given calculate VA a. 6010 ml b. 5110 ml c. 5370 ml d. 4456 ml 15. Based on the values given calculate RV a. 2220 ml b. 1100 ml c. 1300 ml d. 1200 ml 16. 2 alveoli are present. Alveoli A has a radius of 4 and alveoli B has a radius of 8. In the presence of surfactant alveoli A has surface tension of 4 and alveoli B has a surface tension of 8. Which of the following is true? a. The pressure in Alveoli B will be higher than A due to increased tension b. Because of surfactants unique properties collateral ventilation can occur c. Air will be distributed equally in both alveoli due to surfactants effect on radius d. Equal distribution of air in both alveoli due to surfactant effect on surface tension e. Two of the above

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