HomeCoursesMEDSCI 142: Organ SystemsLecture 26 Lecture 26 0% Question 1 of 31 What makes up the total volume? = Vt : VA + Vd. What makes up the total volume? = Vt : VA + Vd. Question 1 of 31Question 2 of 31 What makes up the alveolar volume? = Vt – Vd 2Va. What makes up the alveolar volume? = Vt – Vd 2Va. Question 2 of 31Question 3 of 31 What is the equation for rate of change of alveolar volume? = VA : Fr (VE – Vd). What is the equation for rate of change of alveolar volume? = VA : Fr (VE – Vd). Question 3 of 31Question 4 of 31 How does this differ from the rate of inspiration? = VA : ⅔ Vt. How does this differ from the rate of inspiration? = VA : ⅔ Vt. Question 4 of 31Question 5 of 31 What is normal CO2 – O2 exchange rates? = 0.8 CO2 : O2 (respiratory exchange rate). What is normal CO2 – O2 exchange rates? = 0.8 CO2 : O2 (respiratory exchange rate). Question 5 of 31Question 6 of 31 What is the PCO2 when VA is around GL min-1? = 40 mmHg. What is the PCO2 when VA is around GL min-1? = 40 mmHg. Question 6 of 31Question 7 of 31 What happens to PCO2 during hypoventilation? = Increases. What happens to PCO2 during hypoventilation? = Increases. Question 7 of 31Question 8 of 31 What is the PO2 when ____ is around 4 L min-1? = 10 mmHg. What is the PO2 when ____ is around 4 L min-1? = 10 mmHg. Question 8 of 31Question 9 of 31 What is the maximum PO2 during hyperventilation? = 150 mmHg. What is the maximum PO2 during hyperventilation? = 150 mmHg. Question 9 of 31Question 10 of 31 During control of ventilation: (I) What is regulated? (II) What is sensed? (III) Where is it sensed? = (I) Breathing rate. (II) O2, CO2, pH. (III) Aorta, carotid artery, medulla oblongata. During control of ventilation: (I) What is regulated? (II) What is sensed? (III) Where is it sensed? = (I) Breathing rate. (II) O2, CO2, pH. (III) Aorta, carotid artery, medulla oblongata. Question 10 of 31Question 11 of 31 What is the resting rate of consumption? = 300mL min-1. What is the resting rate of consumption? = 300mL min-1. Question 11 of 31Question 12 of 31 What is the concentration of O2 in F R C? = 300mL. What is the concentration of O2 in F R C? = 300mL. Question 12 of 31Question 13 of 31 What is the normal size of F R C? = 2.5L. What is the normal size of F R C? = 2.5L. Question 13 of 31Question 14 of 31 What is the content O2 of F R C? = 300mL. What is the content O2 of F R C? = 300mL. Question 14 of 31Question 15 of 31 How much is stored as HbO2? = 900mL. How much is stored as HbO2? = 900mL. Question 15 of 31Question 16 of 31 What is the max anoxic survival time? = 4 min. What is the max anoxic survival time? = 4 min. Question 16 of 31Question 17 of 31 Which does the respiratory system react to most – PO2, PCO2 or pH? = PCO2. Which does the respiratory system react to most – PO2, PCO2 or pH? = PCO2. Question 17 of 31Question 18 of 31 Where is PCO2 sensed in the periphery? (2) = Carotid bodies, aortic bodies. Where is PCO2 sensed in the periphery? (2) = Carotid bodies, aortic bodies. Question 18 of 31Question 19 of 31 Which nerves do they utilise? (2) = IX, X. Which nerves do they utilise? (2) = IX, X. Question 19 of 31Question 20 of 31 Where is it sensed in the CNS? = Ventral oblongata medulla. Where is it sensed in the CNS? = Ventral oblongata medulla. Question 20 of 31Question 21 of 31 Where is pH sensed? = Ventral oblongata medulla. Where is pH sensed? = Ventral oblongata medulla. Question 21 of 31Question 22 of 31 What products do CO2 and H2O form? = CO2 + H2O → H2CO3 + → HCO3 - + H+. What products do CO2 and H2O form? = CO2 + H2O → H2CO3 + → HCO3 - + H+.Question 22 of 31Question 23 of 31 How does medulla sense pH? = CO2 → CSF → blood brain barrier → H+ → medulla. How does medulla sense pH? = CO2 → CSF → blood brain barrier → H+ → medulla.Question 23 of 31Question 24 of 31 Why is the system unresponsive to O2 reduction during hypervent? = As we breathe faster CO2 ↓ which is the main ingredient for response. Why is the system unresponsive to O2 reduction during hypervent? = As we breathe faster CO2 ↓ which is the main ingredient for response.Question 24 of 31Question 25 of 31 What happens if CO2 is constant and O2 is reduced? (40mmHg). = Breathing rate skyrockets. What happens if CO2 is constant and O2 is reduced? (40mmHg). = Breathing rate skyrockets. Question 25 of 31Question 26 of 31 What effect does increase in CO2 have on rate of respiration? = Increase. What effect does increase in CO2 have on rate of respiration? = Increase. Question 26 of 31Question 27 of 31 What happens if O2 is kept constant at 110mmHg / 40mmHg? = 150mmHg increase. 40 mmHg vast increase. What happens if O2 is kept constant at 110mmHg / 40mmHg? = 150mmHg increase. 40 mmHg vast increase. Question 27 of 31Question 28 of 31 What are involuntary movements for breathing? (5) = Coughing, breathing, sighing, expectoration, thoracic stabilisation. What are involuntary movements for breathing? (5) = Coughing, breathing, sighing, expectoration, thoracic stabilisation. Question 28 of 31Question 29 of 31 What might be the reason for sighing? = Open closing alveoli. What might be the reason for sighing? = Open closing alveoli. Question 29 of 31Question 30 of 31 What are voluntary breathing movements? (4) = Singing, ventilation, parturition (uterine pressure during childbirth), defecation. What are voluntary breathing movements? (4) = Singing, ventilation, parturition (uterine pressure during childbirth), defecation. Question 30 of 31Question 31 of 31 What are the regulatory bodies of respiration? = DRG, → inspiration VRG – inspiration and expiration. What are the regulatory bodies of respiration? = DRG, → inspiration VRG – inspiration and expiration.Question 31 of 31 Loading...
