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BIOS 255 Exam 3 Review Questions with correct solutions 2024/2025( A+ GRADED 100% VERIFIED).
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BIOS 255 Exam 3 Review Questions with correct solutions 2024/2025( A+ GRADED 100% VERIFIED).
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BIOS 255 Exam 3 ReviewWhat is lung compliance? (high, low, and effort)
Compliance: ability of the lungs and thoracic cage to expand
High compliance = easier to expand thorax
Low compliance = more difficult to expand thorax (can occur with emphysema)
Short answer: List muscles of inspiration and expiration
Expiration:
Internal Intercostals, costal part (principal)
Diaphragm (principal)
Rectus abdominis (accessory)
External Oblique (accessory)
Inspiration:
External Intercostals (principal)
Diaphragm (principal)
Sternocleidomastoid (accessory)
Scalenes (accessory)
Pectoralis minor (accessory)
Internal Intercostals, cartilaginous part (principal)
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Basic Anatomy of the Lungs
Respiratory distress syndrome (surfactant)
Condition often seen in premature infants, caused by lack of surfactant, a substance that helps
keep the lungs inflated and reduces surface tension in the air sacs. Without enough surfactant,
the lungs collapse and there will be difficulty breathing.
Conducting Zone
The conducting zone of the respiratory system consists of those passages that serve only for
airflow, essentially from the nostrils through the major bronchioles.
Respiratory Zone
The respiratory zone consists of the alveoli and other gas-exchange regions of the distal airway.
Mechanism in which lungs exchange gas
Simple Diffusion:
Lung gas exchange occurs through simple diffusion, where oxygen moves from the air in the
lung's alveoli to the blood, and carbon dioxide moves from the blood to alveoli to be exhaled.
Difference between pulmonary respiration vs ventilation
Pulmonary Respiration:
refers to the exchange of gases (oxygen and carbon dioxide) between lungs and blood
Ventilation:
physical process of moving air in and out of lungs
Ventilation
Movement of gases into and out of lungs; between lungs and external environment
Inhalation: air moving from external environment into the lungs
Exhalation: air moving from the lungs to the external environment
Respiration
Exchange of gases across a membrane into and out of a blood vessel.
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