the brain involved in sensory perception. To begin‚ energy from the environment stimulates the receptor cells in whichever sense organ is being used. If this information were auditory‚ the ear would convert sound waves in the air into electrical impulses that would further be interpreted by the brain as sound. A sound wave first enters the pinna‚ the fleshy part of the ear on the outside of the body. It then travels through the external auditory canal where it then meets the eardrum‚ a thin membrane
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Drugs and the nervous system Neurotransmitters within the body include excitatory and inhibitory‚ noradrenalin‚ dopamine‚ serotonin; acetylcholine and glutamate are examples of excitatory neurotransmitters. GABA and glycine are examples of inhibitory neurotransmitters. General anaesthetics General anaesthetics act mainly on the central nervous system to stop information processing; these may be given by inhalation or intravenously. Nitrous oxide or laughing gas is used in maintain anaesthesia
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Key Terms neurotransmitters acetylcholine dopamine serotonin norepinephrine endorphins Exercises 1. Which of the following statements about neurotransmitters is false? a. Neurotransmitters allow impulses to flow from one neuron to another. b. Neurotransmitters prevent impulses from flowing from one neuron to another. c. Neurotransmitters are stored in the cell bodies of neurons. d. Each neurotransmitter is associated with a unique receptor. e. Unused neurotransmitter are recycled
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blanks 61 True/False 62 Bibliography 64 Summary The nervous system is composed of all nerve tissues in the body. The functions of nerve tissue are to receive stimuli‚ transmit stimuli to nervous centers‚ and to initiate response. The central nervous system consists of the brain and spinal cord and serves as the collection point of nerve impulses. The peripheral nervous system includes all nerves not in the brain or spinal cord and connects all parts of the body to the central nervous system
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be taken. To understand the structure and function of multipolar neuron‚unipolar and bipolar neurons. Also to identify the structures of a nerve. There are no safety concerns for this lab. Step 1: Relates to Lab Exercise 10/Activity 1‚ 3‚ and 4. Assignment 1: Write a brief description of the three slides (Neuron‚ Spinal Cord Smear and C.S of Myelinated Nerve Fibers) as though you were explaining it to someone who cannot see the slide. Neuron- There is a reddish rounded shape with lighter thin looking
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the nerves. The nervous system enables a way for the brain to receive information about someone’s surrounding. Then‚ the brain is able to send signals to various areas of the body‚ so it can respond. Millions and millions of cells called neurons creates the nervous system. “Specialized neurons called receptors are located in the ears and eyes and the other sense organs of the body. The receptors translate events in a person’s surroundings . . . into nerve messages‚ which are known as impulses. Nerve
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What is the Nervous System? The nervous system is an organ system that is a network of nerves and fibers that nerve impulses between different parts of the body‚ and is responsible for sending‚ receiving and processing. All the organs and functions rely upon these nerve impulses to function. It’s an example of the body’s master control unit. The nervous system is the control and communication system of your body. its job is to send and receive messages to your body. the nervous system controls
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The homeostatic capability of the body involves an internal balance in order for the body to properly function. This system is known as dual innervations. These are innervations affected by two systems known as the parasympathetic and sympathetic nerve systems. The effector organs for the sympathetic system include: the smooth muscle of blood vessels‚ lungs‚ viscera‚ scalp‚ pupils‚ the heart‚ and glands. The effector organs for the parasympathetic system include: lacrimal glands‚ salivary glands
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Data Table 1 – Epithelial Tissue Observations TISSUE TYPE OBSERVATIONS Simple Squamous single layer‚ flattened cells Simple Cuboidal single layered‚ cube shaped cells Simple Columnar (stomach) single layered‚ elongated cells Simple Columnar (duodenum) long columns in “S” shapes Stratified Squamous (keratinized) many layers‚ top cells flattened Stratified Squamous (non-keratinized) flat long strands with nucleus Pseudostratified Ciliated Columnar cells together in a column
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16‚ 2014 A Case of Spinal Cord Injury 1. Describe the functional anatomy of the spinal cord using the following terms: white matter‚ gray matter‚ tracts‚ roots and spinal nerves. The spinal cord consists of a superficial White matter and a deep Gray matter. The white matter consists of myelinated axons‚ which form nerve tracts and the Gray matter consists of neuron cell bodies‚ dendrites and axons. The white matter in each half of the spinal cord is organized into ventral‚ dorsal and lateral
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