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Hering-Breuer Reflexes Quiz

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Questions and Answers

What is the primary function of the Hering-Breuer inflation reflex?

To prevent over-inflation of the lungs (correct)

To increase the rate of respiration during exercise

To stimulate coughing and sneezing in response to irritants

To regulate tidal volume during normal ventilation

What type of nerve fibers innervate pulmonary irritant receptors?

Non-myelinated sympathetic nerve fibers

Non-myelinated vagal nerve fibers

Myelinated vagal nerve fibers (correct)

Myelinated sympathetic nerve fibers

What is the stimulus for the Hering-Breuer deflation reflex?

Extreme deflation of the lungs (correct)

Over-inflation of the lungs

Tidal volume exceeding 1.5 liters

Normal tidal volume

What is the response to stimulation of pulmonary irritant receptors?

Tachypnea and bronchoconstriction Signup and view all the answers

What is the location of 'J receptors' in the lungs?

In the alveolar walls Signup and view all the answers

What is the effect of cutting the vagi on the Hering-Breuer inflation reflex?

The reflex is abolished Signup and view all the answers

What is the primary mechanism of quiet breathing?

Repetitive inspiratory signals from the dorsal respiratory group Signup and view all the answers

What happens when the respiratory drive for increased pulmonary ventilation becomes greater than normal?

Respiratory signals spill over into the ventral respiratory neurons Signup and view all the answers

What is the function of the pneumotaxic center?

To control the duration of inspiration Signup and view all the answers

What is the role of the ventral respiratory neurons?

To contribute to both inspiration and expiration Signup and view all the answers

What is the result of electrical stimulation of ventral respiratory neurons?

Either inspiration or expiration is stimulated, depending on the neuron Signup and view all the answers

What is the location of the pneumotaxic center?

Dorsally in the nucleus parabrachialis of the upper pons Signup and view all the answers

What is the outcome of cutting the vagus nerve on respiration?

Apnea Signup and view all the answers

What type of receptors are located in the muscular walls of the bronchi and bronchioles?

Stretch receptors Signup and view all the answers

What is the purpose of the Hering-Breuer inflation reflex?

To switch off the inspiratory ramp Signup and view all the answers

What is the role of the dorsal respiratory group of neurons in the Hering-Breuer reflex?

To receive signals from stretch receptors Signup and view all the answers

What type of receptors are stimulated by emotional stimuli from the hypothalamus and limbic system?

Nociceptors Signup and view all the answers

What is the outcome of intact vagus nerve on respiration?

Regular rhythm of respiration Signup and view all the answers