Nervous system essay

Blood flow is redirected towards muscles redirecting necessary fats and sugars to the muscles so that the muscles can be activated for movement and respond efficiently to the danger.

The units which make up the nervous system are called nerve cells or neurons. Any two neurons in the nervous system do not join to one another completely. Primary auditory cortex The primary auditory cortex is located at the top portion of each temporal lobe. Any two neurons in the nervous system do not join to one another completely.

The cell body of a neuron is like a typical animal cell which contains cytoplasm and a nucleus.

Short essay on Human Nervous System

Various parts of these lobes are implicated in the ability for us to see, hear, taste and move, among others. Once the cerebrospinal fluid has been produced by the choroid plexus which lines the upper portions of the ventricles, it travels down the fourth ventricle, to openings at the base of the brain on towards the brain stem.

The outer most layer of the meninges is called the dura mater, the middle layer is called the arachnoid mater and the inner most layer, the pia mater McCaffrey, Woelker Figure 2.

The posterior column tracts are responsible for the following sensations: It is critical in controlling reflexes that regulate breathing and is also responsible for the control and balance of the sleep-wake cycle Weiten, Motor information is transmitted along the efferent branch of the PNS via the somatic nervous system which ends in the skeletal muscles.

The cell body of a neuron is like a typical animal cell which contains cytoplasm and a nucleus. Consider how much easier it is to use your hand to write compared to using your foot. At the end of axon of sensory neuron A, the electrical impulse releases tiny amount of a chemical substance into the synapse or gap.

Based on this, three other important functions can be extrapolated Muller, The CNS is therefore responsible for integrating this sensory information and responding accordingly.

The space under the arachnoid mater, the subarachnoid space, is filled with cerebrospinal fluid and contains blood vessels Applegate, Proposed solution in separate Word document The parasympathetic nervous system will now kick in once the threat of the lion is no longer there. The whole process is contralateral such that stimuli from the right side of space stimulate the left side of the retina in each eye and eventually travel to the left hemisphere of the brain Rains, The former is responsible for the voluntary control of skeletal muscles while the latter is responsible for the involuntary control of balance, muscle tone, eye, and upper limb placement Bassett, The spinocerebellar tracts are responsible for the sensation of proprioception Bassett, 2.

Cerebrospinal fluid functions most importantly to protect the CNS from injury, cushioning the brain during concussions Polzin, Table reflecting changes to the sympathetic and parasympathetic nervous systems Exercise 2a Imagine that you are out walking in the bush when you turn a corner and suddenly come face to face with a lion.

Heart rate returns to a normal rate and fuel and oxygen are circulated to the whole body not just to the vital organs. In spite of this, most literature narrows down the responsibility of the frontal lobes to higher mental processes and is also related to an individual having a sense of self Coon and Mitterer, The frontal lobes are divided into the primary motor cortex and prefrontal cortex.

They are called nerve fibres. The axon has an insulating and protective sheath or cover of myelin around it Myelin is made of fat and protein. In other words, the medulla functions to maintain balance within the body. There is an extremely small, microscopic gap between the end of the axon of neuron A and the dendrite of the next neuron B which is called a synapse We will now explain how the electrical impulse travels through the gap synapse between the two neurons.

So that, for example, when the left parietal lobe is damaged, individuals often lose the ability to perceive or orient themselves to the space on the right side of their bodies, referred to as right-side neglect. A neuron or nerve cell has three components: Motor information is also transmitted via the autonomic nervous system of the PNS which ends in the viscera internal organs, smooth muscles and glands.

A number of long and thin fibres are stretching out from the cell body of a neuron. Other visceral biological processes include thirst, body temperature, circadian rhythms as well as sexual drive and arousal.  -We have 2 parts in our nervous system: The central nervous system (CNS) is the nerves in our brain and spinal chord.

Short essay on Human Nervous System

The peripheral nervous system (PNS) is a network of nerve cells in the rest of our body. -Our nervous system detects stimuli and allows us to react to them. -Stimulus: a change, action or occurrence in the environment that can cause an organism to respond.

- The nervous system is divided into three components: the central nervous system, which encompasses the brain, brain stem, and the spinal cord, the peripheral nervous system, which includes the sensory receptors and effector muscles and organs in the body, and the autonomic nervous system which is part of both the peripheral and central nervous system and controls visceral and largely unconscious.

Central nervous system depressants present many dangers for abusers. Looking at the drugs in this class, describe the risks associated with abuse and discuss at least one problem that counselors should be concerned with during a client’s withdrawal and tr Paper details: Central nervous system depressants present many dangers for abusers.

Free Essay: The Nervous System of the Human Body The nervous system of the human body is responsible for sending, receiving and processing nerve impulses. It. Nervous System essays The nervous system is the most complex part of the body, as they govern our thoughts, feelings, and bodily functions.

It is an important factor in science because it can lead to new discoveries for cures or diseases. The studies of the nervous system helped lower deat. The function of nervous system is to coordinate the activities of our body.

It is the control system for all our actions, thinking and behaviour. The nervous system helps all other systems of our body to work schmidt-grafikdesign.com nervous system is like a manager inside our body. Its job is to control and.

Nervous system essay
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Short essay on Human Nervous System