Which statement is true regarding the Hering-Breuer reflex?

Here is the answer to Which statement is true regarding the hering-breuer reflex?

Which statement is true regarding the Hering-Breuer reflex?

The correct answer is below.

Hering-Breuer reflex

The Hering-Breuer reflex, a reflex inhibition or strengthening effect of inspiration caused by the expansion or contraction of the lungs.

The Hering-Breuer reflex consists of two parts. The most common is the inhibition of sighing when the lungs are inflated, called the pulmonary inflation reflex, and the second is the inspiration effect caused when the lungs are deflated, also called the pulmonary deflation reflex, which occurs only when the lungs are exhaled with force.

The receptors of the Hering-Breuer reflex are located in the smooth muscle layer of the bronchi and fine bronchi and are called tensor receptors. The main stimulus is the dilation of the bronchi and bronchioles.

The afferent fibers are vagal myelinated class A-fibers, with a conduction velocity of about 35-50 m/s, and the central medullary respiratory center, which regulates the respiratory rate and works with the pontine respiratory adjustment center to maintain respiratory rhythm.

These results are taken from observations in mammals. Some scholars believe that when the human body is breathing calmly, the tidal volume is not too large and the lung inflation reflex does not play any role. When the tidal volume increases to 800 ml, the frequency of vagal afferent impulses increases, which causes inhibition of inspiratory actions.

Scholars believe that the excitation value of the medullary inspiratory center is higher in awake subjects. The physiological significance of the inflated pulmonary retractor reflex is to prevent excessive lung expansion.

The Hering-Breuer reflex is a reflex that regulates respiratory rate, which is also associated with heart rate. This is because the signals sent through the nervous system in relation to this reflex are sent along the same pathway that regulates heart rate.

The Hering-Breuer reflex works in a slightly different way between species. This reflex has been studied extensively in humans and non-human animals to understand how it works and under what conditions it is impaired.

Receptors in the respiratory system called pulmonary retractor receptors monitor the lungs as they begin to expand when someone breathes. The main purpose of this reflex is to limit the possibility of overinflation of the lungs.

Receptors in the respiratory system called pulmonary traction receptors monitor the lungs when they begin to expand when a person breathes. When these receptors detect that the lungs have when exhalation is adequate, they send a signal that triggers exhalation. These receptors also act at the end of exhalation to stimulate another inhalation.

Damage to the vagus nerve and brain bridges may lead to respiratory arrhythmias.

This reflex is named after researchers Joseph Brewer and Carl Ewald Constantine Herring, who recorded it during their studies of animals under anesthesia in the late 19th century. They demonstrated that apnea, or respiratory arrest, could be caused by keeping the lungs overinflated.

When someone is placed on a ventilator, care must be taken to avoid overinflation of the lungs, as the patient’s Hering-Breuer reflex does not serve to regulate breathing.

Correct Answer

Here is the correct answer to Which statement is true regarding the Hering-Breuer reflex?

• Answer: Prevents overdistension of the lungs

The Hering-Breuer reflex prevents overdistension of the lungs.

An increase in hydrogen ion concentration will result in an increase in tidal volume through the central chemoreceptors.

A decrease in hydrogen ion concentration will result in a decrease in respiratory rate through peripheral chemoreceptors. The Hering-Breuer reflex does not lead to a decrease in the number of functional alveoli

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