PE A&P - Respiratory System
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16 Terms
What is the pathway of air?
Mouth/nose
Trachea
Bronchi
Bronchioles
Alveoli
What is the definition of breathing frequency (f)?
The number of breaths per minute
What is the definition of tidal volume (TV)?
The volume of air inspired or expired in one breath
What is the definition of minute ventilation (VE)?
The volume of air inspired or expired per minute
What is the equation for minute ventilation?
Breathing frequency (f) x Tidal volume (TV) = Minute ventilation (VE)
What is the definition of residual volume?
The volume of air reaminint in the lungs after maximum expiration
What is the definition of inspiratory reserve volume?
The volume of air inspired by force after a regular breath
What is the definition of expiratory reserve volume?
The volume of air expired by force after a regular breath
What happens to expiratory and inspiratory reserve volume during exercise?
The decrease to allow the tidal volume to increase
What happens to residual volume during exercise?
It stays the same to prevent the lungs from collapsing
What happens to the diaphragm during inspiration?
The diaphragm flatten by contracting and increases the volume of the thoracic cavity
What happens to the external intercostals during inspiration?
They pull the ribs up and out by contracting, which increases the volume of the thoracic cavity
What happens to the diaphragm during expiration?
The diaphragm returns to a dome shape by relaxing and decreases the volume or the thoracic cavity
What happens to the external intercostals during expiration?
They relax and move the ribs down and in, which decreases the volume of the thoracic cavity
When does diffusion occure in gas exchange at the alveoli?
When O2 moves froma high concentration in the alveoli to a low concentration in the capillaries
When CO2 moves from a high concentration in the capillaries to a low concentration in the alveoli
What are the 4 factors that aid diffusion?
High capillary density
High alveoli density
Shot diffusion distance due to thin membrane
Blood travels slowly through the capillaries
Note 
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