Biology · Gaseous Exchange
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Expiratory centre in medulla is:
- A
Dorsal
- B
Ventral
- C
Lower part
- D
All of the above
The dorsal and lateral regions contain the expiratory centre, they stimulate expiration and inhibit inspiration.
The dorsal respiratory group (DRG) mainly regulates expiration. It inhibits inspiration and stimulates expiration.
The ventral respiratory group (VRG) in the medulla contains the inspiratory centre. It is not responsible for expiration and it increases the depth and rate of inspiration.
The lower part of the medulla is not specifically involved in respiratory control. It serves as a transition to the spinal cord and manages other neural functions.
This option is incorrect because the expiratory center is specifically located in the ventral region of the medulla, not in the dorsal or lower parts.
Tagged under Biology · Gaseous Exchange · 2018