.ill T-Mobile 2:50 PM 62% KIN 320-Exam 3-Study Guide-2015 . Understand pulmonary
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.ill T-Mobile 2:50 PM 62% KIN 320-Exam 3-Study Guide-2015 . Understand pulmonary ventilation. What drives our stimulus to breathe? Why does ventilation increase during exercise? . How/why does gas exchange occur between the pulmonary capillaries and the alveoli and muscle capillaries and the muscle cells? . How is oxygen carried in the blood? 4. How is CO2 carried in the blood? 6. Understand what the Bohr Effect is and why it occurs. 7. What is the ventilatory threshold? What is the lactate threshold? Are the two related? 8. Understand the pathway of blood through the heart 9. Why does heart rate increase during exercise? 10. Understand Starling's Law of the heart. 12. Understand the different ways that Starlings Law and autonomic-induced increases in contractility can impact stroke volume independent of one another. 13. Understand the function of the two branches of the autonomic nervous system in relation to their control of heart rate and contractility 14. Understand the function of baroreceptors. 15.Why does VO2 increase with increasing exercise intensity? 16. Be able to define VO2max. 17. Know how and why contracting muscle gets more blood flow during exercise (exercise hyperemia) 18. Understand the bicarbonate buffer systemExplanation / Answer
1. Pulmonary Ventilation is the process of breathing, in which the air flows into the lungs during inhalation & expelled out during the exhalation.
The flow of air into & outward is due to the difference in pressure between the atmosphere and the gases inside the lungs.
During exercise the pressure of Co2 in the tissue increases, which is compensated by increasing the ventilation thereby supplying more O2.
2. Oxygen exchange between Alveoli to capillaries and to the tissue are dependant on the concentration of oxygen molecules. The oxygen moves from the higher concentration level to the lower.
3. Oxygen binds to the hemoglobin molecule in the Red Blood Corpuscles present in the blood and carried to the tissues.
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