Regulation of Respiration in Respiratory System

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What is the primary function of the dorsal respiratory group of neurons?

To regulate respiratory rhythm and inspiration (correct)
To control expiration
To transmit signals to the pneumotaxic center
To receive sensory inputs from the peripheral chemoreceptors

Where is the pneumotaxic center located?

Medulla oblongata
Pons (correct)
Dorsal respiratory group
Ventral respiratory group

What type of receptors provide sensory inputs to the dorsal respiratory group from the liver, pancreas, and parts of the GIT?

Mechanoreceptors (correct)
Peripheral chemoreceptors
Baroreceptors
Receptors in the lungs

What is the role of the ventral respiratory group of neurons?

To regulate expiration (D) Signup and view all the answers

What is the effect of the dorsal respiratory group on breathing rate?

It regulates respiratory rhythm (C) Signup and view all the answers

What type of neurons does the dorsal respiratory group emit?

Repetitive inspiratory neuronal action potentials (A) Signup and view all the answers

What is the primary response of the respiratory system to an increase in O2 consumption and CO2 formation during heavy exercise?

Increase in alveolar ventilation (D) Signup and view all the answers

What is the effect of sympathetic activation on respiratory muscles?

Bronchodilation and inhibited glandular secretion (B) Signup and view all the answers

What is the most common cause of sleep apnea?

Mechanical obstruction of the upper airway (D) Signup and view all the answers

What triggers the increase in ventilation during exercise?

Efferent impulses from the brain stem (B) Signup and view all the answers

What is the role of the parasympathetic nervous system in respiration?

Stimulation of bronchoconstriction and stimulated glandular secretion (B) Signup and view all the answers

What is the term for the absence of spontaneous breathing?

Apnea (A) Signup and view all the answers

What is the main function of the ventral respiratory group (VRG)?

To drive expiration by providing a strong expiratory output to the abdominal muscles (D) Signup and view all the answers

What type of receptors are responsible for preventing the lungs from overstretching?

Stretch receptors (B) Signup and view all the answers

How does the Hering-Breuer inflation reflex affect inspiration?

It switches off inspiration (D) Signup and view all the answers

What is the primary response to an increase in CO2 and H+ concentration levels in the tissues?

Increased inspiratory and expiratory motor signals to the respiratory muscles (D) Signup and view all the answers

What is the role of the dorsal respiratory group of neurons?

To receive signals from stretch receptors to prevent the lungs from overstretching (A) Signup and view all the answers

What is the effect of oxygen on the respiratory center of the brain?

Oxygen does not have a major direct effect on the respiratory center (A) Signup and view all the answers