Anatomy Exam 1 Flashcards
Boyle’s Law
Volume and pressure are inversely related. Ex: Volume increases, pressure decreases. Volume decreases, pressure increases.
Transverse
divides lower and upper half
Atmospheric Pressure
Pressure outside the body.
Sagittal
Divides left and right
Ventral vs Dorsal
Pertaining to belly. Pertaining to back of body
Sequence of events for inspiration.
- Inspiratory muscles contract (diaphragm descends, rib cage rises)
- thoracic cavity volume increases.
- lungs stretched; alveolar volume increases.
- alveolar (pulmonic) pressure drops.
- Air flows into the lungs until pressure is equalized.
Anterior vs posterior
Front and Back
Cranial vs caudal
Towards the skull vs towards the tail
Superior vs inferior
Above vs below
Sequence of events for inspiration.
- expiratory muscles contract (diaphragm rises; rib cage descends)
- thoracic cavity volume decreases.
- elastic lungs recoil; alveolar volume decreases.
- alveolar (pulmonic) pressure rises.
- air flows out of the lungs until alveolar pressure is o.
Proximal vs distal
Towards the origin vs away from origin
Respiratory Cycle
One cycle is one inspiration and one expiration.
Medial vs lateral
toward midline vs away from midline
Tidal Volume (TV)
The volume of air exchanged during one cycle of respiration.
Expiratory Reserve Volume
The maximum volume of air that can be expelled following passive, tidal expiration.
Inspiratory Reserve Volume (IRV)
The maximum volume of air that can be inhaled after a tidal inspiration.
(Also known as resting lung volume)
Superficial vs deep
Closer to surface vs further from surface
Residual Volume (RV)
The volume of air that remains in the lungs after maximum exhalation.
Dead Air Space
Air in the conductive passageway of the respiratory system that never undergoes gas exchange.
External vs internal
Outside vs within body
Vital Capacity (VC)
Total volume of air that can be inspired after a maximal expiration.
IRV+TV+ERV
Flexion
Bending at a joint toward ventral surface
Extension
Act of pulling 2 ends further apart (opposite of flexion)
Functional Residual Capacity (FRC)
The volume of air present in the lungs at the end of passive expiration.
ERV+RV
Hyperextension
Extending too much
Inspiratory Capacity (IC)
The maximum inspiratory volume possible after tidal expiration.
TV+IRV
Total Lung Capacity (TLC)
The sum of all of the volumes.
TV+IRV+ERV+RV
Five pressures for nonspeech and speech function.
- Alveolar pressure
- intrapleural pressure
- subglottal pressure
- intraoral pressure
- atmospheric pressure
Alveolar (pulmonic) Pressure
Pressure that is present within individual alveolus
Intrapleural Pressure
Pressure in the space between the parietal and visceral pleura. It is negative throughout respiration.
Subglottal Pressure
Pressure beneath the level of the vocal folds (glottis).
Intraoral (mouth) pressure
The pressure within the oral cavity.
Pressure changes during inspiration
- lung volume increases
- alveolar pressure decreases
- subglottal pressure decreases
- intraoral pressure decreases
- intrapleural pressure decreases
Pressure changes during expiration
- lung volume decreases
- alveolar pressure increases
- subglottal pressure increases
- intraoral pressure increases
- intrapleural pressure increases