Flashcards in Chapter 31 & 32 - Ventilation & perfusion of the lungs and Control of Ventilation (2019) by Keim Deck (40)
The afferent nerves associated with the HeringBreuer reflex would indicate?
Inspiration is occurring
The inherent rhythm for inspiration appears to be located within the ________:
The peripheral chemoreceptors for oxygen increase the rate of discharge primarily in response to _______:
Decrease in partial pressure of blood oxygen
Which of the following is NOT true with dorsal respiratory group?
It contains somatic motor neurons whose axons leave the medulla via CNIX and CNX
Intermediate ventral group
These neurons fire more action potentials during specific parts of the respiratory cycle
Respiratory related neurons
Peripheral chemoreceptors are:
Sensitive to decreases in arterial PO2
An example of dyspnea in adaptive response:
Transection at this level gives breathing to continue but with abnormal gasping pattern:
A transection at this level blocks ventilation by interrupting output to the diaphragm not by eliminating the respiratory rhythm
Mid-pons transection with bilateral vagotomy
Which of the following is NOT true in neuron-like characteristics of glomus cells?
Some are innervated by post-ganglionic sympathetic neurons
It is the primary source of feedback for assessing the effectiveness of ventilation and major source of tonic drive for breathing:
The effect of raising the arterial PCO2 :
Increases the sensitivity of the integrated response to hypoxia
TRUE or FALSE: All neurons that fire in phase with respiratory cycle are involved in control of breathing
Mechanoreceptors within the trachea-bronchial tree detect changes in lung volume by sensing stretch of airway walls
Slowly-adapting pulmonary stretch receptors
In adults, this reflex does not occur until lung volume is greater than during a normal respiration:
Which of the following is NOT true responses of respiratory during exercises?
Arterial pH does not change during strenuous exercises
Which of the following is an example of balancing conflicting demands of gas exchange?
Playing a musical wind instrument
Which of the following is NOT true in mechanisms of low PO2?
Causes oxygen to move into the glomus cells generating hydrogen
In the respiratory membrane, the rate of diffusion is inversely proportional to which of the following factors?
Thickness of the respiratory membrane
True statement regarding ventilation and perfusion:
V/Q is lowest at the base
Which parameter is affected when a patient is mechanically ventilated?
In lung perfusion, zone is evident in which of the following condition?
The relationship of the alveolar PO2 to alveolar ventilation:
Which of the following refers to exchange of gases between blood and tissues?
Understanding the pressure dynamics in the lung when barometric pressure is greater than alveolar pressure, what is the outcome?
There is movement of air into the lungs
Which of the following conditions presenting with hypoxemia will likely to have a normal alveolar-arteriolar gradient?
Which of the following can magnify ventilation and perfusion mismatch?
Both restrictive and obstructive lung disease