Regulation Of Respiration Flashcards
Name three separate mechanisms are involved in the Neural regulation of respiration
- Respiratory center
- Peripheral and central chemoreceptors
- Autonomic nervous system
The respiratory center composed of what?
Composed of neurons in the medulla oblongata and pons
Autonomic nervous system is divided into 2. Name those 2
Sympathetic and Parasympathetic nerves
Respiratory center is located where?
Brain stem
Respiratory center located in the brain stem set basic rhythm of respiration of?
Medulla oblongata
Pons
Respiratory center composed of three groups of neurons, list them
- Dorsal respiratory group
- Ventral respiratory group
- Pneumotaxic center
Dorsal respiratory group of respiratory center is located where?
Located within the nucleus tractus solitarius
Dorsal respiratory group of respiratory center innervates?
Insipiratory muscle
Dorsal respiratory group transmit nerve impulse go?
Insipiratory mucles
The function of dorsal respiratory group.
Control rate and duration (ramp signal) inspiration (~2 seconds)
Where is the pneumotaxi center located
Located dorsally in the superior portion of the pons
Function of pneumotaxic center
Control inspiration period-control the switch off point of the insipiratory ramp.
Explain the relationship between electrical impulses and rate of breathing base on pneumotaxic center
Increase rate of electrical impulses increase the rate of breathing
Decreased rate of electrical impulses decrease the rate of breathing
The relationship is inversely proportional.
When does the ventral respiratory center inactive?
Inactive during normal quite breathing- at rest
Where does the ventral respiratory center innervate?
Innervates both inspiratory and expiratory muscles
When does it’s mainly contribute respiration? Ventral respiratory group
When pulmonary ventilation is greater than normal eg exercise
Does ventral respiratory group send powerful electrical impulses? If it so where?
Yes it’s does
Send powerful electrical impulses to abdominal muscle to drive expiration during exercise
Where chemosensitive neurons are located?
Located in the ventral surface of the medulla oblongata
Sympathetic activation on respiration what is happening
- Bronchodilation- bronchial miscle relaxation
- Inhibit glandular secretion (decrease humidity)
What is parasympathetic activation on respiration
- Bronchoconstriction- bronchial muscle construct
- Stimulate glandular secretions (increase humidity)
Where are peripheral chemoreceptor system is located?
Outside the brain
Majority of chemoreceptor are found where?
Carotid and aortic bodies
Carotid and aortic bodies are composed of?
O2 sensitive cells called glomus cells
What is the glomus cells detect?
Detect O2 levels in the blood
