Exam 3: BIOS 255 / BIOS255 (Latest Update 2025 / 2026) Anatomy and Physiology III with Lab | Questions with Answers | Grade A | 100% Correct - Chamberlain

Exam 3: BIOS 255 / BIOS255 (Latest
Update ) Anatomy and
Physiology III with Lab | Questions
with Answers | Grade A | 100%
Correct - Chamberlain


Question:
respiratory membrane
Answer:
thin barrier between the alveolar air and blood




Question:
3 layers of the respiratory membrane
Answer:
squamous alveolar cells, capillary endothelial cells, basement membrane

,Question:
pleurae
Answer:
double-layered membrane that lines the thoracic wall and surface of the lung




Question:
function of pleurae
Answer:
reduced friction during breathing & creates a pressure gradient that expands
the lungs during inhalation




Question:
visceral pleura
Answer:
inner layer that covers the lung surface




Question:
parietal pleura
Answer:
outer layer that lines the inner surface of the thoracic wall

,Question:
pleural cavity
Answer:
potential space between the 2 layers that contains a film of slippery pleural
fluid




Question:
how much airflow does the diaphragm account for?
Answer:
two-thirds




Question:
what keeps the diaphragm alive?
Answer:
phrenic nerves (C3-C5)




Question:
how much airflow do the intercostal muscles account for?
Answer:
one-third

, Question:
internal intercostal muscles
Answer:
muscles contract and pull the ribcage inward during forced exhalation




Question:
external intercostal muscles
Answer:
pulls the ribs upward during inhalation




Question:
atmospheric (barometric) pressure
Answer:
pressure applied upon us from the surrounding air; sea level average =
760mmHg




Question:
intrapulmonary pressure
Answer:
pressure w/in alveoli of the lungs; this pressure changes as air is inhaled or
exhaled