An element is a pure substance that is made from a single type of atom. Elements are the building blocks for all the rest of the matter in the world.
The pneumotaxic center, also known as the pontine respiratory group (PRG), is a network of neurons in the rostral dorsal lateral pons.It consists of the Koelliker-KÃ¶lliker fuse nucleus and the medial parabrachial. Nucleus it is considered an antagonist to the apneustic, center which produces abnormal breathing during. inhalationespiratory effects [edit]. The PRG antagonizes the apneustic center, cyclically inhibiting inhalation. The PRG limits the burst of action potentials in the phrenic nerve, effectively decreasing the tidal volume and regulating the respiratory rate.
System (CNS) and the Peripheral Nervous System (PNS). ï§CNS is composed of the brain (located in the cranial cavity) and the spinal cord (located in the vertebral cavity), which. serve as the main control centers for all body activities. ï§PNS is composed of nerves derived from the brain and spinal. cord (12 pairs of cranial nerves and 31 pairs of spinal. nerves) which serve as linkage between the CNS and the. body. Â© 2017 Ebneshahidi. ANS Versus SNS. ï§PNS can be subdivided into sensory (afferent) nerves and motor (efferent) nerves.