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Co-ordination Essay Example

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When the impulses reach the appropriate level they leave the cord to travel to the target organ.The peripheral system acts as a connection between the nervous system and the rest of the body. The peripheral system is divided into the nerves, the somatic nervous system and the autonomic nervous system. The nerves are made up of neurones that enable the travel of impulses from the centre where the activity in the body takes place to the CNS. The somatic nervous system allows the control of the skeletal muscle. The autonomic nervous system controls the automatic functions of the body such as digestion and resting.The messages in body travel from one neuron to the next across a synapse. Sensory neurons in the system carry messages from a receptor to the brain. Motor neurons then send the message to effector in the glands and muscles. Neurone is the basic unit of the nervous system. The cells are specialized to transmit messages faster from one part of the body to the other. The messages are transmitted through electric impulses.There are three types of neurons namely the sensory, the motor and the interneurons. Sensory neurons are characterised with long dendrites and a short axon. They are specialised in conveying messages from the sensory receptors in the body to the central nervous system. Motor neurons are characterised with along axon and short dendrites. Motor neurons are specialized to transmit messages from the central nervous system to the glands or to the nerves for the right actions after the message have been interpreted. The interneurons are those that send messages between the sensory neurons and the motor neurons in the central nervous system.Reflex arc is the path that is followed by a nerve impulse from the periphery to the nervous system and then to the effector organs to correct the situation. Reflex arc is through stages and it takes place when a receptor detects a stimulus that is due to change in the environment. The sensory neurons then sends signal to the relay neurone for appropriate functions. The motor neurone then sends a signal to the effector which produces a response to the action.A nerve impulse is an electric signal that is sent and travel along an axon. The signal is sent through the difference that occurs between the inside of the axon and the surrounding. When there is activation of the nerve, there

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preview essay on Co-ordination
  • Pages: 8 (2000 words)
  • Document Type: Essay
  • Subject: Biology
  • Level: Masters
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