Divisions of the Nervous System CNS & PNS
Outline of the Components and Functions of the Reflex Arcs
It is a path of neurons connecting various nervous system cells that send information to the spinal cord from the body. The five significant components of reflex arcs include muscles, motor neurons, interneurons, sensory neurons, and receptors. Receptors are found along the membrane of proteins neurons (Sanes, Reh & Harris, 2011). It reacts to any gesture are happening around the environment. It creates awareness in the brain anytime part of the body or skin is pressed. The receptors also respond to smell, taste, light, sound, or pain. Sensory neurons have the sensory receptors activated anytime the receptors react to the environment. They ensure the spinal cord, brain, and central nervous system receive information.
Interneurons are the pivot of the nervous system. It connects all the sensory cells for a response that activates the interneurons. Motor Neurons; the spinal cord is where the interneurons join with the motor neurons for an action to convey information to the body through the central nervous system (Sanes, Reh & Harris, 2011). Muscles react to contraction information transmitted by the motor neurons. When the muscles contract, they cause the body to move.
Difference between Sympathetic and Parasympathetic Nervous System
Sympathetic Nervous System
It is located in the spinal cord. The nerve controls the respiratory system, the pupil, and the heart rate. For the body to be alert, the nerve increases the stress and body speed (Sanes, Reh & Harris, 2011). The adrenaline response causes vasoconstriction, increased heart rate, and skeletal muscle vasodilation.
Parasympathetic Nervous System
The brainstem of the spinal cord is where the parasympathetic nerve is located, and it controls the visceral organ. It also controls the salivary gland, tear, and nasal mucous glands (Sanes, Reh & Harris, 2011). As the nerve controls many tissues, the maintenance of life is not controlled by it. When a human is resting, it is because of the sympathetic nerve. It also helps during digestion and reduces the human heartbeat.
The sympathetic nerve manages the fight to fight response, while the parasympathetic nerve manages the heart rate and stress.
Reference
Sanes, D. H., Reh, T. A., & Harris, W. A. (2011).Development of the nervous system. Academic Press.
Nervous System: In order to achieve its function, the nervous system is divided into two major parts i.e. The Central Nervous System (CNS) and Peripheral Nervous System (PNS). The central nervous system is basically made up of the brain and spinal cord and has the main function of receiving information from the body and sending out instructions. While the brain is protected by the skull, the spinal cord is guarded
Nervous System Lymphoma page literature review "Primary Central Nervous System Lymphoma The primary central nervous system lymphoma The primary central nervous system lymphoma is a cancer type that is very rare, and affects the central nervous system i.e. spinal cord, brain, brain coverings, optic nerves, or the eyes. The cancer being referred to as a lymphoma indicates that its cells are lymphocytes which are a white blood cell type. Primary central nervous
The efferent division of the peripheral nervous system carries out the motor commands that are sent from the central nervous system. These commands or signals are then sent directly through the nerve fibers of the peripheral nervous system to the target organs where they will then be signaled to perform the desired action (Martini, Nath, & Bartholomew, 380). The peripheral nervous system can be further broken down as being a
What happens is this over production of neurons results in a kind or "pre-programmed 'suicide' mechanism called apoptosis" (Marino, 2010). So if the brain kills off these neurons on purpose, what happens to the dead neurons? Journalist Melissa Marino asserts that the body must dispose of the dead neurons or else the body's immune system is in trouble. Interestingly, Dr. Bruce Carter (a biochemistry professor) of Vanderbilt has discovered the
Nervous System The major structures of basal ganglia are pallidum, substantia nigra, subthalamic nucleus, and striatum. They are inappropriately named because the name striatum refers to all major components of basal ganglia. However it was used to refer to only one of the structures. The general function of basal ganglia is to take part in learning and motor control. Is called motor cortex, receives its primary input from the ganglia structures The
Parkinson's Disease The human central nervous system is a miraculously designed functional piece of our bodies that helps us conduct the most essential tasks to help in our survival. It is therefore very important to investigate and understand how this system functions and operates. In this investigation it is also useful to understand how disease and malfunction of this system are affected. The purpose of this essay is to describe the
Our semester plans gives you unlimited, unrestricted access to our entire library of resources —writing tools, guides, example essays, tutorials, class notes, and more.
Get Started Now