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FM1030 Physiology > Reflexes in respiratory system > Flashcards

Reflexes in respiratory system Flashcards

1
Q

What information is relayed to respiratory centres via cranial nerves?

A

Thermoreception
Chemoreception
Mechanoreception

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2
Q

Which cranial nerves relay information to respiratory centres?

A

Trigeminal nerve
Vagus nerve
Glossopharyngeal nerve

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3
Q

What can modify breathing and upper airway dilator muscle activity?

A

Airway temperature
Pressure
CO2 concentration

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4
Q

Which reflex is the primary mechanism for defending airway from aspiration of liquids?

A

Laryngeal Chemoreflex

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5
Q

When is the laryngeal chemoreflex especially potent?

A

In early life

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6
Q

What is key for the laryngeal chemoreflex?

A

Central apnoea and laryngeal adduction

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7
Q

Which disease implicates fatal apnoea when a baby does not have a potent laryngeal chemoreflex?

A

Sudden infant death syndrome

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8
Q

What is the stimulus of cough and sneeze reflexes?

A

Mechanical and chemical irritation of airways

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9
Q

What sensors are responsible for the cough and sneeze reflexes?

A

A delta and C fibres in conducting airways

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10
Q

What is the pathway of the cough/sneeze reflex

A

Trigeminal and/or vagus nerve

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11
Q

What is the cough/sneeze reflex?

A

Apnoea or hyperpnoea
bronchoconstriction
Sneeze/cough

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12
Q

What is the function of the cough and sneeze reflexes?

A

Protects lungs

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13
Q

What is the other name for the Hering-Breuer Reflex?

A

Inflation reflex

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14
Q

What stimulates the Hering-Breuer Reflex?

A

Lung distension

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15
Q

What are the sensors for the Hering-Breuer Reflex?

A

Stretch receptors

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16
Q

What is the pathway of the Hering-Breuer reflex?

A

Vagus nerve

17
Q

What is the Hering-Breuer reflex?

A

Inhibit inspiration

18
Q

What is the function of the Hering-Breuer reflex?

A

Unknown
Establish rate and depth
Prevent over distension

19
Q

What stimulates the Pulmonary-Vascular reflexes?

A

Vascular congestion or interstitial oedema

20
Q

What sensors are involved in pulmonary-vascular reflexes?

A

J receptors

21
Q

What is the pathway of pulmonary-vascular reflexes?

A

Vagus nerve

22
Q

What does the pulmonary-vascular reflex trigger?

A

Tachypnoea

23
Q

What is the function of the pulmonary-vascular reflex?

A

Unclear
Dyspnoea associated with heart failure and exercise

FM1030 Physiology (10 decks)

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