Exam 3: BIOS255 / BIOS 255 (Latest
Update 2024 / 2025) Anatomy & Physiology III with Lab | Exam Weeks 5 – 7 Review | 100% Correct | Grade A - Chamberlain
Question:
External respiration
Answer:
exchange of gases between alveolar air and blood in pulmonary capillaries
Question:
Simple diffusion
Answer:
the reason o2 and co2 move across alveolar membrane
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Question:
simple diffusion
Answer:
movement of a solute from an area of high concentration to an area of low concentration
Question:
Henry's law
Answer:
Amount of gas that dissolves in water is determined by partial pressure of that gas in the air; each gas acts independently
Question:
Systemic arterial (o2) blood
Answer:
PO2 of 100mmHg, PCO2 of 40mmHg
Question:
PO2 in blood
Answer:
40 mmHg
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Question:
PO2 in alveoli
Answer:
100 mmHg
Question:
Solubility of gases
Answer:
Each gas differs in its ability to dissolve in water More soluble -> diffuse across membrane more rapidly
Question:
Ventilation-perfusion coupling
Answer:
Airflow and blood flow are matched to each other
Question:
gas transport
Answer:
process of carrying gases from alveoli to systemic tissues and vice versa
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Question:
most oxygen (98.5%) is bound to
Answer:
hemoglobin (Hb) in RBCs
Question:
hemoglobin with one or more o2 bound
Answer:
oxyhemoglobin
Question:
hemoglobin with no oxygen bound
Answer:
deoxyhemoglobin
Question:
each hemoglobin can carry up to
Answer:
Four o2 molecules (four heme groups)
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