Running head: the nervous system The nervous system The nervous system is divided into central nervous system and peripheral nervous system depending upon their anatomy and functions. The two most important components of the central nervous system are brain and spinal cord…
The autonomic division is made up of motor neurons which connect skeletal muscles with the central nervous system, thereby coordinating and controlling functioning of various organs. The brain and spinal cord together control all body functions, behavior as well as body movements in coordination with the peripheral nervous system. The CNS and PNS are interdependent for effective functioning. Besides these, various parts in the brain are involved in memory-related activities because of which the brain is very important part as memory leads to cognition and human learning. The brain also aids in reasoning, thinking, recognizing and other cognitive activities (Carlson, 2011). Yet, the brain receives stimulus for memory from the sensory neurons of the PNS. The spinal cord’s function is to coordinate muscle movements and cause body or muscle reflexes to external and internal stimuli. All these functions are carried out through structures within each component that are highly complex and are made up of nerve cells or neurons. Hence, the most important components of CNS are brain and spinal cord and that of PNS include sensory and motor neurons. References Carlson, N. (2011). Foundations of behavioral neuroscience (8th ed.). Boston, MA: Pearson Education. ...
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Therefore, the autonomic nervous system controls the involuntary activities of the smooth muscles and several undertakings o the glands. It forms a component of the peripheral nervous system and can be subdivided into two categories. These include the sympathetic and parasympathetic nervous system. In all these categories are comprised of effector neurons which connect the central nervous system top their effector organs.
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The central nervous system comprises of the brain and the spinal cord, whereas the peripheral nervous system includes the spinal nerves and cranial nerves. The PNS essentially acts as a channel to relay sensory impulses
As the author of the essay puts it, the Central Nervous System form the major portion of the nervous system and includes both the brain as well as the spinal cord. Furthermore, some classifications of the Central Nervous System also include retina and the cranial nerves as part of the Central Nervous System.
A. Corresponding to the position of an optic disc, blind spot is a minute portion of the visual field of human eye within the retina. This area cannot detect any images as it does not have any photoreceptors (Dean, Rosen, Mathe,
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