Question

NEURAL REGULATION OF RESPIRATION : 1. A specialised centre present in the medulla region of the brain called respiratory rhythm centre is primarily responsible for this regulation. 2. Pneumotaxic centre present in the pons region of the brain. Neural signal from this centre can reduce the duration of inspiration and thereby alter the respiratory rate. Regarding 1 and 2 :

Answer 1

Regarding 1 and 2 : we can deduce that,
1) The pneumotaxic Centre present in the pons is located at the dorsal part of pons varolii. The function of the pneumotaxic Centre is primarily to limit inspiration.
2)The second, being, Apneustic Centre (which is another extremely strange Centre), located in the lower part of the pons varolli. The function of this Centre is not understood but it is thought that it operates in the association with the pneumotaxic Centre to control the depth of inspiration. Apneustic Centre is considered hypothetical but still considerable to a string of benches.

Now, when talking about the respiratory rhythm Centre present in medulla oblongata;
The respiratory centre is composed of groups of neurons located in the medulla oblongata and pons varolii. Hence respiratory centre is divided into the medullary respiratory centers and pons respiratory centres (discussed before on the first note).
Counting on the Medullary respiratory centres, we have two more groups under it.
1) Dorsal respiratory group (DRG), located in dorsal portion of the medulla oblongata. The dorsal respiratory group mainly causes inspiration.
2) Ventral respiratory group (VRG), it is located in the ventrolateral part of the medulla oblongata. The ventral respiratory group can cause either inspiration or expiration, depending upon which neurons in the group are stimulated.

Should help as always.