gives a multipolar neuron its name? A multipolar neuron contains several short and highly branched processes known as dendrites and that’s what gives it the name. C. What are the functions of the dendrites and axons? The dendrites receive signals from other neurons cells‚ and axons transmit these signals within our bodies. Activity 2: Structures of Selected Neurons ( NO SUBMISSION) Activity 3: The Neuroglia and Supporting Cells Please fill in the cell corresponding with the description:
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resting membrane potential. b. This results from a change in membrane permeability first to Na then to K due to the opening of what type of ion channels? Voltage gated channels 2. a. Where is the density of voltage-gated Na+ channels the greatest? Axon hillock b. What areas of the neuron generate signals that open these voltage-gated channels? Dendrites and the cell body c. Opening of these channels causes the membrane to depolarize. (voltage change). 3. a. If the membrane reaches the trigger
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it consists of the axon hillock. The signals transmitted from the first zone is integrated in this region. If the signal is strong enough‚ an action potential would be initiated. Third zone is specialized for signal conduction‚ it consists of the axon. The axon carries the information‚ usually from action potentials‚ from the cell body to the axon terminal. The fourth zone of a neuron is for signal transmission to target cells‚ it consists of the axon terminals. These axon terminals form the synapse
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11: Fundamentals of the Nervous System and Nervous Tissue Study guide Functions and Divisions of the Nervous System 1. List the basic functions of the nervous system. 2. Explain the structural and functional divisions of the nervous system. Histology of Nervous Tissue 3. List the types of neuroglia and cite their functions. 4. Define neuron‚ describe its important structural components‚ and relate each to a functional role. 5. Differentiate between a nerve and a tract
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NAME ________________________________________ HUMAN PHYSIOLOGY BMS 108 First Midterm – Summer 2013 DR. BARRY D. TANOWITZ 1. Put your name at the top and on your Scantron. 2. Answers for questions 1-‐ 50 will be placed on a Scantron (Green strip‚ 100 questions) – all questions 1 point each.
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Axon which propagates or takes the nerve impulses toward another neuron‚ a gland cell or muscle fibers. The dendrites which are the main input region. Integration occurs in the cell body‚ which includes cellular organelles. Synapses are places for functional contact between 2 excitable cells. Axon terminals contain synaptic vesicles filled with neurotransmitter molecules. Fast and slow axonal transport are systems for conveying materials to and from the cell body and axon terminals. Neurons
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Site Plan | I. Neurons/nerve cells A neuron is a cell specialized to conduct electrochemical impulses called nerve impulses or action potentials. Neuron is the main cellular component of the nervous system‚ a specialized type of cell that integrates electrochemical activity of the other neurons that are connected to it and that propagates that integrated activity to other neurons. They are the basic information processing structures in the CNS.
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Unit: Coordination and Control The human body is made up of many cells which form and create different tissues and organs within the body. Control and coordination are required to enable all functions within the body to work accordingly and appropriately at the specific times required. The system
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that surround the axons of some of the neurons in the CNS are formed by A) Schwann cells. B) chroid plexus C) oligodendrocytes. D) microglia. E) arachnoid villi 5. Aggregations of rough ER in neurons are referred to as A) neurofilaments. B) axon hillock C) telodendria. D) Nissl bodies. E) soma. 6) Neurons that have one axon and one dendrite are called A) anaxonic. B) unipolar. C) bipolar. D) northpolar. E) multipolar. 7) Neurons that have several dendrites and a single axon are called A) anaxonic
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called the axon. Although in some neurons‚ it is hard to distinguish from the dendrites‚ in others it is easily distinguished by its length. The purpose of the axon is to transmit an electro-chemical signal to other neurons‚ sometimes over a considerable distance. Longer axons are usually covered with a myelin sheath‚ a series of fatty cells which have wrapped around an axon many times. They serve a similar function as the insulation around electrical wire. At the very end of the axon is the axon
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