Chapter 31 & 32 - Ventilation & perfusion of the lungs and Control of Ventilation (2019) by Keim Flashcards Preview

PHYSIOLOGY - 1st Year 1st Sem Comprehensive Exam > Chapter 31 & 32 - Ventilation & perfusion of the lungs and Control of Ventilation (2019) by Keim > Flashcards

Flashcards in Chapter 31 & 32 - Ventilation & perfusion of the lungs and Control of Ventilation (2019) by Keim Deck (40)
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1

The afferent nerves associated with the HeringBreuer reflex would indicate?

Inspiration is occurring

2

The inherent rhythm for inspiration appears to be located within the ________:

Medulla

3

The peripheral chemoreceptors for oxygen increase the rate of discharge primarily in response to _______:

Decrease in partial pressure of blood oxygen

4

Which of the following is NOT true with dorsal respiratory group?

Efferent role

5

It contains somatic motor neurons whose axons leave the medulla via CNIX and CNX

Intermediate ventral group

6

These neurons fire more action potentials during specific parts of the respiratory cycle

Respiratory related neurons

7

Peripheral chemoreceptors are:

Sensitive to decreases in arterial PO2

8

An example of dyspnea in adaptive response:

Panic attacks

9

Transection at this level gives breathing to continue but with abnormal gasping pattern:

Ponto-medullary transection

10

A transection at this level blocks ventilation by interrupting output to the diaphragm not by eliminating the respiratory rhythm

Spino-medullary transection

11

Inspiratory apneusis:

Mid-pons transection with bilateral vagotomy

12

Which of the following is NOT true in neuron-like characteristics of glomus cells?

Some are innervated by post-ganglionic sympathetic neurons

13

It is the primary source of feedback for assessing the effectiveness of ventilation and major source of tonic drive for breathing:

Central chemoreceptors

14

The effect of raising the arterial PCO2 :

Increases the sensitivity of the integrated response to hypoxia

15

TRUE or FALSE: All neurons that fire in phase with respiratory cycle are involved in control of breathing

FALSE

16

Mechanoreceptors within the trachea-bronchial tree detect changes in lung volume by sensing stretch of airway walls

Slowly-adapting pulmonary stretch receptors

17

In adults, this reflex does not occur until lung volume is greater than during a normal respiration:

Hering-breuer reflex

18

Which of the following is NOT true responses of respiratory during exercises?

Arterial pH does not change during strenuous exercises

19

Which of the following is an example of balancing conflicting demands of gas exchange?

Playing a musical wind instrument

20

Which of the following is NOT true in mechanisms of low PO2?

Causes oxygen to move into the glomus cells generating hydrogen

21

In the respiratory membrane, the rate of diffusion is inversely proportional to which of the following factors?

Thickness of the respiratory membrane

22

True statement regarding ventilation and perfusion:

V/Q is lowest at the base

23

Which parameter is affected when a patient is mechanically ventilated?

Dead space

24

In lung perfusion, zone is evident in which of the following condition?

Hemorrhage

25

The relationship of the alveolar PO2 to alveolar ventilation:

Directly proportional

26

Which of the following refers to exchange of gases between blood and tissues?

Respiration

27

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

28

Which of the following conditions presenting with hypoxemia will likely to have a normal alveolar-arteriolar gradient?

Hypoventilation

29

Which of the following can magnify ventilation and perfusion mismatch?

Both restrictive and obstructive lung disease

30

Which zone in the pulmonary perfusion zones represent continuous blood flow?

Zone 3