Select the correct statement regarding the respiratory rhythm centers.

The respiratory centers in the brain are stimulated by which of the following?

The respiratory rhythm center is located in the .......

In humans,the concentration of carbon dioxide in the plasma

Select the correct statements regarding Hering-Breuer reflex.
$i$. Stretch receptors of the lungs are stimulated during maximum forceful expiration.
$ii$. Vagus nerves send impulses to the expiratory center.
$iii$. Prevents lungs from inflation to the point of bursting.
$iv$. Controls depth and rhythm of respiration.
$v$. Promotes the lungs for maximum inflation.
Choose the correct option:

Into how many types is the regulation of respiration divided?