HUMAN PHYSIOLOGY
BREATHING AND RESPIRATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Dorsal
|
|
|
Ventral
|
|
|
Medial
|
|
|
Central
|
Detailed explanation-1: -The ventral respiratory group controls voluntary forced exhalation and acts to increase the force of inspiration. The dorsal respiratory group (nucleus tractus solitarius) controls mostly inspiratory movements and their timing.
Detailed explanation-2: -The ventral respiratory group (VRG) located in the region of the nucleus ambiguus and retroambigualis is responsible for both inspiration and expiration.
Detailed explanation-3: -A rise in carbon dioxide or a decline in oxygen levels in the blood stimulates an increase in respiratory rate and depth.
Detailed explanation-4: -The respiratory center is located in the medulla oblongata and is involved in the minute-to-minute control of breathing.
Detailed explanation-5: -The dorsal respiratory group includes inspiratory (I) bulbospinal and propriobulbar neurons, P cells, but few expiratory (E) propriobulbar neurons. The ventral respiratory group includes bulbospinal, laryngeal and propriobulbar I and E neurons.