EEOB 2520: EXAM 13 Latest
Questions and All Correct Answers.
Alveoli: Characteristics - Answer -air chambers in lungs
-high surface area
-small distance: to get nutrients across & aid diffusion through capillary walls to alveolar walls
Alveolar Walls - Answer very thin, surround the air pockets
Alveoli Type I: Gas Exchange - Answer -sit alongside the walls of air pockets
Alveoli Type II: Surfactant - Answer -do NOT have high surface area/thin walls
-look like regular cells
-serve to lengthen lifespan of the alveolar cells
-hydrostatic pressure on walls caused by H2O pushing the air
-keep alveoli open
If we only had Type I Cells, Alveoli would ___________. - Answer collapse
Alveoli Type II: Surfactant: Functions - Answer 1) Do not provide any structural support: their
lining (surfactant) REDUCES air pressure
2) Helps keep surface area HIGH (by keeping alveoli open)
3) Premature babies don't have surfactant cells activated, so to substitute, they are given
soapy/bubbly substance to stand-in until type II cells activate
Thoracic Cavity: Limits - Answer -upper: ribs
-lower: diaphragm
-muscles for convective flow
Thoracic Cavity: Contents - Answer Lung & Heart
Thoracic Cavity: Size control muscles - Answer 1) Intercostals
, 2) Diaphragm
Intercostals - Answer -betwixt the ribs
Diaphragm - Answer -raises or lowers to constrict or expand the thoracic cavity volume
-utilizes skeletal muscle
-NOT the muscles that move the lungs
Pleural Sac - Answer -has TWO walls that surround an air sac
-essentially a water-filled balloon
1) Parietal Pleura
2) Visceral Pleura
Parietal Pleura - Answer -OUTSIDE
-attached to thoracic cavity wall
Visceral Pleura - Answer -INSIDE
-attached to the lungs
-lungs are INDIRECTLY connected to the bones through the pleura and fluid components
For fluid-transferred movements, hydrogen bonding creates ______________. - Answer
cohesion
Cohesion - Answer thin film of H2O that moves the pleura (both parietal and visceral)
together
Pneumothorax - Answer -Collapsed Lung
-Puncturing the pleural sac causes collapse
-air cannot get in/break the seal of the pleura
-ruins fluid-movement transfer
-NO CONVECTION ABILITY (ribcage is fine)
What is air pressure dependent on? - Answer 1) Temperature (constant)
Questions and All Correct Answers.
Alveoli: Characteristics - Answer -air chambers in lungs
-high surface area
-small distance: to get nutrients across & aid diffusion through capillary walls to alveolar walls
Alveolar Walls - Answer very thin, surround the air pockets
Alveoli Type I: Gas Exchange - Answer -sit alongside the walls of air pockets
Alveoli Type II: Surfactant - Answer -do NOT have high surface area/thin walls
-look like regular cells
-serve to lengthen lifespan of the alveolar cells
-hydrostatic pressure on walls caused by H2O pushing the air
-keep alveoli open
If we only had Type I Cells, Alveoli would ___________. - Answer collapse
Alveoli Type II: Surfactant: Functions - Answer 1) Do not provide any structural support: their
lining (surfactant) REDUCES air pressure
2) Helps keep surface area HIGH (by keeping alveoli open)
3) Premature babies don't have surfactant cells activated, so to substitute, they are given
soapy/bubbly substance to stand-in until type II cells activate
Thoracic Cavity: Limits - Answer -upper: ribs
-lower: diaphragm
-muscles for convective flow
Thoracic Cavity: Contents - Answer Lung & Heart
Thoracic Cavity: Size control muscles - Answer 1) Intercostals
, 2) Diaphragm
Intercostals - Answer -betwixt the ribs
Diaphragm - Answer -raises or lowers to constrict or expand the thoracic cavity volume
-utilizes skeletal muscle
-NOT the muscles that move the lungs
Pleural Sac - Answer -has TWO walls that surround an air sac
-essentially a water-filled balloon
1) Parietal Pleura
2) Visceral Pleura
Parietal Pleura - Answer -OUTSIDE
-attached to thoracic cavity wall
Visceral Pleura - Answer -INSIDE
-attached to the lungs
-lungs are INDIRECTLY connected to the bones through the pleura and fluid components
For fluid-transferred movements, hydrogen bonding creates ______________. - Answer
cohesion
Cohesion - Answer thin film of H2O that moves the pleura (both parietal and visceral)
together
Pneumothorax - Answer -Collapsed Lung
-Puncturing the pleural sac causes collapse
-air cannot get in/break the seal of the pleura
-ruins fluid-movement transfer
-NO CONVECTION ABILITY (ribcage is fine)
What is air pressure dependent on? - Answer 1) Temperature (constant)
