Nervous system essay

Meningitis can sometimes subsequently causes hindrances to the flow of cerebrospinal fluid or an uncharacteristic accumulation of cerebrospinal fluid, termed hydrocephalus Polzin, Exercise 2c Study the simplified diagram of the layers of an orange below: The function of nervous system is to coordinate the activities of our body.

An example would be the dilation of your pupils if you are reading this chapter in poor lighting, something you cannot consciously control. Visual information is transferred to the axons of ganglion cells located at the back of each eye.

Unlike other information pathways in the cerebral lobes, the auditory pathway is not contralateral. This chemical substance crosses the gap or synapse and starts a similar electrical impulse in the dendrite of the next neuron B.

The central nervous system consists of the brain and spinal cord. The thalamus is often considered a transmission point for the cerebral cortex, mediating inbound and outbound sensory information.

It is clear that both dendrites and axon arise from the cell body of a neuron.

The Nervous System

Neurons are of three types: You might be wondering Nervous system essay we are studying these basic biological structures and functions, questioning how they are relevant to psychology, which is the study of human behaviour Weiten, The nerve impulses are carried over this small gap between a pair of neurons by means of a chemical substance called neurotransmitter substance.

The central nervous system consists of the brain and spinal cord. The medulla is primarily responsible for the control of unconscious involuntary body responses or reflexes.

The nervous system is extremely complex and comprises various subsystems and structures Kalat, Neurons contain the same basic parts as any other animal cell but their structure is specially adapted to be able to carry messages over large distances in the body quickly.

Proposed solution in separate Word document The sympathetic nervous system will be activated when coming face to face with a lion. The axon has an insulating and protective sheath or cover of myelin around it Myelin is made of fat and protein.

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The sensory and motor information is conveyed to and from the brain by way of different channels, or tracts, in the spinal cord. 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.

Digestion is commenced since the body is now in a rest state and can begin to focus energies on everyday essential but not vital in the presence of danger functions. The subconscious motor tracts are responsible for posture and balance, subconscious reactions of the head and upper limbs to auditory and visual stimuli in addition to control over involuntary eye movements, respiratory and skeletal muscles Bassett, It is critical in controlling reflexes that regulate breathing and is also responsible for the control and balance of the sleep-wake cycle Weiten, This conscious control of muscles means that the somatic nervous system generally controls voluntary behaviours and activities Plotnik and Kouyoumdjian, In this way, synapses ensure that nerve impulses travel in only one direction through a particular set of neurons.

It can be divided into two main structures, namely the tectum and tegmentum Rains, At some points in the cranium the inner and outer layers of the dura mater separate from one another forming a cavity, called the dural sinuses.

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This conscious control of muscles means that the somatic nervous system generally controls voluntary behaviours and activities Plotnik and Kouyoumdjian, Airways in lungs dilate in order to allow maximum flow of oxygen to the vital organs and less to the extremities.

Importantly to note is that while the directives for muscular movements do not originate in the cerebellum itself but rather from systems higher in the brain ; the cerebellum is critical in regulating the motor information that conducts these movements Weiten, The nervous system also coordinates things which we don't have to think about, like heart beat and breathing.

The subconscious motor tracts are responsible for posture and balance, subconscious reactions of the head and upper limbs to auditory and visual stimuli in addition to control over involuntary eye movements, respiratory and skeletal muscles Bassett, This network of nerves making up the PNS is specified into an afferent branch of incoming sensory nerves which transmits impulses from the periphery of the body inwards into the CNS peripheral body can include internal organs, muscles, glands and somatic areas.

This impulse travels from the dendrite of sensory neuron A to its cell body and then along its axon. Heart rate returns to a normal rate and fuel and oxygen are circulated to the whole body not just to the vital organs. -We have 2 parts in our nervous system: The central nervous system (CNS) is the nerves in our brain and spinal chord.

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.

Short essay on Human Nervous System

-Stimulus: a change, action or occurrence in the environment that can cause an organism to respond. 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 kellysquaresherman.com nervous system is like a manager inside our body.

Its job is to control and. 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. 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.

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 Nervous System Essay. The Nervous System is comprised of two subdivisions. The central nervous system is the coordinating system for the body.

The peripheral nervous system is a very complex network of nerves that extend across the whole body. Both are vital to the human body and without either life would not exist. The nervous system works.

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