Term
| DURING A NORMAL RESPIRATORY CYCLE WHEN IS THE MAJORITY OF THE TIME SPENT? |
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Definition
| AT END (REST) EXPIRATION POINT |
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Term
| WHAT IS FUNCTIONAL RESIDUAL CAPACITY? WHAT IS AIRFLOW? |
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Definition
| VOLUME IN THE LUNGS AT THE END OF A NORMAL EUPENIC EXPIRATION. RESTING VOLUME. AIRFLOW IS ZERO REGARDLESS OF RESISTANCE |
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Term
| WITH EXPIRATION IS THERE AN INWARD ALVEOLAR ELASTIC RECOIL WHICH IS EQUAL TO THE OUTWARD CHEST WALL ELASTIC RECOIL? |
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Definition
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Term
| WHEN IS PULMONARY VASCULAR RESISTANCE AT THE LOWEST POINT? |
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Definition
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Term
| WHAT IS TOTAL LUNG CAPACITY? WHEN IS PVR THE HIGHEST? |
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Definition
| AMOUNT OF AIR THAT THE LUNGS CAN HOLD. PVR IS HIGHEST AT TLC |
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Term
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Definition
| IF WE EXHALE AS MUCH AIR AS POSSIBLE. |
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Term
| THE BODY SPEND MOST OF THE RESPIRATORY CYCLE AT WHICH CAPACITY? |
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Definition
| FUNCTIONAL RESIDUAL CAPACITY. MAKES SENSE THAT PVR IS LOWEST IT CAN POSSIBLY BE DURING THE PHASE THAT LASTS THE LONGEST |
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Term
| DURING THE FRC IS THERE AIRFLOW? |
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Definition
| NO AIRFLOW B/C NO PRESSURE GRADIENT BETWEEN ALVEOLAR AND ATM PRESSURE |
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Term
| FRC IS PROBABLY ___ TIMES AS LONG AS THE ACTIVITY ON INSPIRATION/EXPIRATION. |
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Definition
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Term
| DESCRIBE NEGATIVE PRESSURE VENTILATION. |
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Definition
| MEANS THAT WE ARE LOWERING ALVEOLAR PRESSURE CAUSING A PRESSURE GRADIENT PULLING AIR INTO ALVEOLI. AMOUNT OF AIR THAT COMES IN DEPENDS ON THE PRESSURE GRADIENT. |
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Term
| DURING EUPNEIC INSPIRATION THE FORCE GENERATED BY THE INSPIRATORY MUSCLES CAUSES THE CHEST WALL TO MOVE ___ AND THE DIAPHRAGM TO MOVE ___. |
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Definition
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Term
| WITH INSPIRATION AS THE CHEST WALL BEGINS TO MOVE OUT, THE OUWARD ELASTIC RECOIL OF CHEST WALL (DECREASES OR INCREASED)? |
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Definition
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Term
| DURING INSPIRATION AS THE CHEST WALL BEGINS TO MOVE OUT, ARE THE ELASTIC RECOIL OF ALVEOLUS (BIGGER OR SMALLER)? |
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Definition
| BIGGER. IF YOU BLOW UP A BALLON TO A LARGER VOLUME, IT WILL WANT TO SNAP BACK IN MORE |
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Term
| DURING INSPIRATION WHAT KIND OF PRESSURES DOES THE INTRAPLEURAL SPACE DO? |
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Definition
| AS THE INTRAPLEURAL SPACE INCREASES THE INTRAPLEURAL PRESSURE DECREASES. EX. -5CMH20 TO -8CMH20 |
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Term
| DURING A FORCED INSPIRATION WHAT WILL THE INTRAPLEURAL PRESSURES DROP DOWN TO? |
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Definition
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Term
| ARE THE VISCERAL PLEURA AND PARIETAL PLEURA STUCK TOGETHER? |
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Definition
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Term
| DURNG INSPIRATION AS THE CW MOVES OUT WHAT HAPPENS TO THE ALVEOLAR VOLUMES? |
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Definition
| THEY WILL INCREASE. THEY ARE PULLED/SUCKED OPEN. THE ALVEOLAR VOLUME HAS INCREASE SINCE THE ALVEOLAR PRESSURE HAS DECREASED. THIS ALLOWS AIRFLOW SINCE ATM PRESSURE= 0. |
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Term
| AT THE END OF INSIRATION, THE ALVEOLAR PRESSURE = WHAT? |
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Definition
| 0 CMH20 OR EQUAL TO ATM PRESSURE. |
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Term
| HOW CAN WE SAY THAT THE PRESSURE IS NOT GING TO CHANGE SINCE THE VOLUME OF THE ALVEOLUS IS LARGER? |
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Definition
| ALVEOLI ARE NOT A CLOSED SYSTEM, THEY DO NOT ADHERE TO BOYLE'S LAW |
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Term
| WHEN WILL INSPIRATION STOP? |
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Definition
| AIR WILL CONTINUE TO ENTER THE LUNDS UNTIL ATM PRESSURE IS = ALVEOLAR PRESSURE. THEN INSPIRATION WILL STOP. |
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Term
| TRANSMURAL PRESSURE IS ALSO KNOWN AS WHAT? |
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Definition
| ALVEOLAR ELASTIC RECOIL. IT IS THE DIFFERENCE BETWEEN ALVEOLAR PRESSURE AND INTRAPLEURAL PRESSURE. |
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Term
| WHEN WILL TRANSMURAL PRESSURE INCREAS? (INSPIRATION OR EXPIRATION)? |
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Definition
| INSPIRATION. MORE ELASTIC INWARD RECOIL DURING INPSIRATION AND AT THE END OF INSPIRATION THAN WHEN WE BEGAN. |
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Term
| WHAT IS THE AVERAGE TRANSMURAL PRESSURE AT END OF INSPIRATION? |
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Definition
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Term
| DURING INSPIRATION WHAT WILL THE PRESSURE OF THE ALVEOLUS DO? |
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Definition
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Term
| DOES THE PARITEAL PLEURA MOVE WITH THE CHEST WALL? |
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Definition
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Term
| AS THE INTRAPLEURAL SPACE INCREASES WHAT DOES THE INTRAPLEURAL PRESSURE DO? |
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Definition
| DECREASE. INTRAPLEURAL SPACE IS SUB-ATMOSPHERIC (AT ALL TIME) |
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Term
| AS THE ALVEOLAR VOLUME INCREASES WHAT HAPPENS TO THE ALVEOLAR PRESSURE? |
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Definition
| IT DECREASES. AIR IS SUCKED IN FASTER AS THE ALVEOLAR PRESSURE FALLS |
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Term
| AS ALVEOLI ARE SEMI-FILLED WITH AIR WHAT HAPPENS TO THE VOLUME THAT COMES IN? |
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Definition
| THE LUNGS PULL IN AIR SLOWER AND SLOWER. AT THE LOWEST POINT OF THE ALVEOLAR PRESSURE CURVE (1 SEC) WE HAVE THE LARGEST PRESSURE GRADIENT BETWEEN ATM PRESSURE AND ALVEOLAR PRESSURE, WHICH WILL GENERATE THE HIGHEST AMOUNT OG AIRFLOW. AS THE PRESSURE GRADIENT DECREASES AND THE ALVEOLAR PRESSURE RETURNS TO ATM PRESSURE, AND THE AIRFLOW DECREASES. |
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Term
| LOOKING AT THE TIDAL VOLUME THE GREATEST CHANGE IN VOLUME PER UNIT TIME (HIGHEST SLOPE) OCCURS WHEN? |
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Definition
| AT 1 SECOND. PULLING AIR IN AT THE FASTEST RATE. |
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Term
| DURING EXHALATION WHAT DOES THE INTRAPLEURAL SPACE AND PRESSURE DO? |
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Definition
| INTRAPLEURAL SPACE DECREASES AND THE INTRAPLEURAL PRESSURE INCREASES |
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Term
| DURING EXPIRATION AS THE ALVEOLAR VOLUME DECREASES WHAT DOES THE ALVEOLAR PRESSURE DO? |
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Definition
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