RESP
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| During inspiration, lungs are stretched; intrapulmonary volume increases. | show 🗑
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| As the external intercostals contract ribs elevate and sternum flares | show 🗑
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| Simultaneous movement of inspiratory muscles increase vertical and horizontal volume. | show 🗑
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| During expiration, inspiratory muscles relax (diaphragm rises and rib cage descends due to gravity. | show 🗑
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| During expiration, intrapulmonary pressure rises to +1mmHg | show 🗑
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| During expiration, air (gases) flow out of lungs down its pressure gradient until intrapulmonary pressure is 0 | show 🗑
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| During expiration, ribs and sternum are depressed as external intercostals relax | show 🗑
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| Respiration is an intracellular process in the mitochondria | show 🗑
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| THE NERVOUS SYST. AUTOMATICALLY ADJUSTS THE RATE OF ALVEOLAR VENTILATION ALMOST EXACTLY TO THE BODY'S DEMANDS, THUS ARTERIAL PO2 AND PCO2 ARE HARDLY MODIFIED EVEN WITH MODERATE TO INTENSE EXERCISE OR OTHER RESP. DISTRESS. | show 🗑
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| THE SIGNAL TRANSMITTED TO THE PRIMARY INSPIRATORY MUSCLES (DIAPHRAGM AND EXTERNAL INTERCOSTALS) IS A RAMP SIGNAL WHICH STARTS FROM 0 AND CONTINUES WITH A STEADY INCREASE FOR ABOUT 2 SECONDS. | show 🗑
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| RAMP SIGNAL STOPS FOR 3 SECONDS AND STARTS AGAIN THUS CAUSING A STEADY INCREASE IN THE PULMONARY VOL. DURING INSP. INSTEAD OF INSPIRATORY GASPS. | show 🗑
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| THE DURATION OF EXPIRATION IS DETERMINED BY THE DURATION OF INSPIRATION. | show 🗑
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| THE VENTRAL GROUP IS MOSTLY INVOLVED IN INCREASED LEVELS OF VENTILATION | show 🗑
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| H+ AND CO2 DIRECTLY STIMULATE THE RESP. CENTER CAUSING INCREASE OF THE INSPIRATORY AND EXPIRATORY SIGNALS. | show 🗑
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| AFTER FRESH O2 GETS TO THE ALVEOLI, THE NEXT STEP IS ITS Passive transport DIFFUSION INTO THE PULMONARY BLOOD AND CO2 IN THE OPPOSITE DIRECTION. | show 🗑
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| THE NET DIFFUSION OF A GAS IN ONE DIRECTION IS A DIRECT EFFECT OF ITS CONC. GRADIENT” | show 🗑
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| PRESS. AGAINST A SURFACE IS CAUSED BY THE CONSTANT IMPACT OF KINETICALLY MOVING MOLECULES AGAINST THAT SURFACE THE TOTAL PRESS. OF A GAS IS DIRECTLY PROPORTIONAL TO THE CONC. OF THE GAS MOLECULES | show 🗑
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| EACH GAS CONTRIBUTES TO THE TOTAL PRESS. IN DIRECT PROPORTION TO ITS [ ] | show 🗑
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| GASES DISSOLVED IN H2O OR THE BODY TISSUES ALSO EXERT PRESSURE BECAUSE THE DISSOLVED MOLECULES ARE MOVING RANDOMLY AND HAVE KINETIC ENERGY. | show 🗑
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| THE PRESSURE OF A GAS IN A SOLUTION IS DETERMINED NOT ONLY BY ITS CONC. BUT ALSO BY THE SOLUBILITY COEFFICIENT OF THE GAS | show 🗑
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| THE PARTIAL PRESS. OF EACH GAS TENDS TO FORCE MOLECULES OF THAT GAS INTO SOLUTION, FIRST IN THE ALVEOLAR MEMB. AND THEN IN THE BLOOD OF THE ALVEOLAR CAPILLARIES. | show 🗑
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| THE RATE AT WHICH THEY ESCAPE FROM ONE MEDIUM TO ANOTHER IS DIRECTLY PROPORTIONAL TO THEIR PARTIAL PRESSURE IN THE BLOOD. | show 🗑
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| O2 IS GOING TO THE BLOOD | show 🗑
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| CO2 IS COMING FROM THE BLOOD | show 🗑
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| Va/Q = capacity for ventilation for this is area is infinity, but no gas exchange can occur. | show 🗑
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Created by:
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