Two Components Of The Nervous System

1251 Words 6 Pages
Student no:16472374

The nervous system and neuron communication

The nervous system is a highly complex and broad area of biopsychology. People depend on the nervous system for their survival and safety.This essay will explore the components from which the nervous system is composed and their main functions. This essay will also decipher the mechanisms through which neurons communicate.

According to Carlson (2014) the Nervous system is branched into two categories - the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS is made up of the brain and spinal cord. The PNS holds cranial nerves, spinal nerves and peripheral ganglia. According to Farley, Johnstone, Hendrey and McLafferty (2014), the brain is
…show more content…
Its main functions are to circulate motor neurons to the glands and muscles and also to gather sensory information and transporting it to the brain. It controls reflex actions without the need for the brain’s commands. It is made of white and grey matter. Carlson states that at birth the spinal cord and vertebral column are of equal length however as the body matures the Spinal cord grows two-thirds as long as the vertebral column. He describes the PNS as a construction of cranial nerves, spinal nerves and peripheral ganglia that exit the CNS. Twelve pairs of cranial nerve cells are connected to the ventral surface of the brain. These nerves are specialised for receiving and sending sensory and motor information from the head and neck area. Spinal nerves commence at the dorsal and ventral roots of the spinal cord. The nerves from the PNS mentioned above leave the vertebral column, and progress towards the muscle and sensory receptors while at the same time dividing and branching out. These branches usually flow alongside …show more content…
Without our nervous system we would not be able to carry out basic actions such as eating, sleeping, walking or talking. It governs several systems that we require to survive, which include the endocrine system, the digestive system and the cardiovascular system. It is the nervous system that protects us from harm and injury. Primarily, if neurons were incapable of communicating with each other this would prevent the nervous system from functioning, therefore it is evident how vital the nervous system is for survival.


Carlson, N. R. (2014). Physiology of Behaviour. (11th ed.). Essex: Pearson Education.

Farley, A., Johnstone,C. , Hendry, C., McLaffery, E. (2014). Nursing Standards. Nervous system: part 1., 28 (31), 46-51.

Kalat, W. (2011). Introduction to psychology (9th ed.). Belmont: Wadsworth, Cengage Learning.

Temburni, M. and Jacob M H. (2001) 98 (7),

Related Documents