BIO 253L FINAL EXAM LAB 6 QUESTIONS AND ANSWERS
Which layer of the pleura lines the inner surface of the chest wall? - CORRECT ANSWER✅✅parietal
Which layer of the pleura lines the outer surface of the chest wall? - CORRECT ANSWER✅✅visceral
pleurisy - CORRECT ANSWER✅✅inflammation of either the parietal or visceral pleural membrane
causes the membranes to rub against each other.
pleural effusion - CORRECT ANSWER✅✅occurs when excess fluid collects in the space between the
pleural membranes.
Pneumothorax - CORRECT ANSWER✅✅infection or trauma may cause air to accumulate in the pleural
space
What happens during inspiration - CORRECT ANSWER✅✅-diaphragm contracts and external intercostal
muscles
-the lung expand
-intrathoracic pressure becomes negative (lower than atm)
-thoracic volume increases as lungs expand
expiration - CORRECT ANSWER✅✅-diaphragm and external intercostal muscles relax
-increase in interthoracic pressure (higher than atm)
-air flows out
Which is true
1. it occurs down a pressure gradient
2. it results from expansion of the lung volume through skeletal muscle activity
3. it occurs because the volume of air in the lungs is lower at the end of expiration - CORRECT
ANSWER✅✅1&2 true
, which is not true
1. pneumotachometers record changes in air pressure
2.airflow can be found from the volume using integration
3. airflow can be found from the volume integration - CORRECT ANSWER✅✅2 and 3
respiratory acidosis - CORRECT ANSWER✅✅A drop in blood pH due to hypoventilation (too little
breathing) and a resulting accumulation of Co2.
respiratory alkalosis - CORRECT ANSWER✅✅Arise in blood pH due to hyperventilation (excessive
breathing) and a resulting decrease in CO2.
metabolic acidosis - CORRECT ANSWER✅✅caused by disease or alkalosis
inspiratory reserve volume - CORRECT ANSWER✅✅Amount of air that can be forcefully inhaled after a
normal tidal volume inhalation (about 3L)
Tidal Volume - CORRECT ANSWER✅✅the volume of air moved in one cycle of breathing. About .5L,
constitutes about 10% of total volume of air moved in a maximal breath
expiratory reserve volume - CORRECT ANSWER✅✅maximum we cane shale from our lungs at the end
of a normal breath (1.5L)
Residual volume - CORRECT ANSWER✅✅Amount of air remaining in the lungs after a forced exhalation
NEVER COMPLETELY EMPTY (ABOUT 1.2L)
inspiratory capacity - CORRECT ANSWER✅✅total amount inhaled at end of normal inhalation
tidal volume + inspiratory reserve volume
expiratory capacity - CORRECT ANSWER✅✅total amount breathed out at end of normal expiration
Tidal volume+ERV
Which layer of the pleura lines the inner surface of the chest wall? - CORRECT ANSWER✅✅parietal
Which layer of the pleura lines the outer surface of the chest wall? - CORRECT ANSWER✅✅visceral
pleurisy - CORRECT ANSWER✅✅inflammation of either the parietal or visceral pleural membrane
causes the membranes to rub against each other.
pleural effusion - CORRECT ANSWER✅✅occurs when excess fluid collects in the space between the
pleural membranes.
Pneumothorax - CORRECT ANSWER✅✅infection or trauma may cause air to accumulate in the pleural
space
What happens during inspiration - CORRECT ANSWER✅✅-diaphragm contracts and external intercostal
muscles
-the lung expand
-intrathoracic pressure becomes negative (lower than atm)
-thoracic volume increases as lungs expand
expiration - CORRECT ANSWER✅✅-diaphragm and external intercostal muscles relax
-increase in interthoracic pressure (higher than atm)
-air flows out
Which is true
1. it occurs down a pressure gradient
2. it results from expansion of the lung volume through skeletal muscle activity
3. it occurs because the volume of air in the lungs is lower at the end of expiration - CORRECT
ANSWER✅✅1&2 true
, which is not true
1. pneumotachometers record changes in air pressure
2.airflow can be found from the volume using integration
3. airflow can be found from the volume integration - CORRECT ANSWER✅✅2 and 3
respiratory acidosis - CORRECT ANSWER✅✅A drop in blood pH due to hypoventilation (too little
breathing) and a resulting accumulation of Co2.
respiratory alkalosis - CORRECT ANSWER✅✅Arise in blood pH due to hyperventilation (excessive
breathing) and a resulting decrease in CO2.
metabolic acidosis - CORRECT ANSWER✅✅caused by disease or alkalosis
inspiratory reserve volume - CORRECT ANSWER✅✅Amount of air that can be forcefully inhaled after a
normal tidal volume inhalation (about 3L)
Tidal Volume - CORRECT ANSWER✅✅the volume of air moved in one cycle of breathing. About .5L,
constitutes about 10% of total volume of air moved in a maximal breath
expiratory reserve volume - CORRECT ANSWER✅✅maximum we cane shale from our lungs at the end
of a normal breath (1.5L)
Residual volume - CORRECT ANSWER✅✅Amount of air remaining in the lungs after a forced exhalation
NEVER COMPLETELY EMPTY (ABOUT 1.2L)
inspiratory capacity - CORRECT ANSWER✅✅total amount inhaled at end of normal inhalation
tidal volume + inspiratory reserve volume
expiratory capacity - CORRECT ANSWER✅✅total amount breathed out at end of normal expiration
Tidal volume+ERV
