The sensory structures associated with the aortic arch and carotid artery are made up of:

What happens to the respiratory process in a man going up a hill?

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:

Human beings have a significant ability to maintain and moderate the respiratory rhythm to suit the demands of the body tissues. This is achieved by

Rate of breathing is controlled by

The rate of respiration is directly proportional to: