7. The nucleus of the neuron is located within the cell body of the neuron. 8. Clusters of rough endoplasmic reticulum are called chromatophilic substance. 9. Nerve impulses arise in an area called the trigger zone of the axon. 10. Synaptic vesicles store neurotransmitter. 11. Nerve impulses are received and conducted toward the cell body by dendrites. 12. The effectors for the somatic nervous system are muscles. 13. Nerve cell bodies in the PNS generally are clustered together to form a ganglion.
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The nucleus of the neuron is located within the cell body of the neuron. This statement is true. The nucleus of a neuron is located within the cell body, which is also known as the soma. Show more…
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Nervous System Part A Nervous Tissue Learning about Nervous Tissue 1 Matching anatomy of the neuron: a Region that connects axon to the initial segment b Receives incoming impulses c Contains genetic material d Cell body e Contains vesicles with neurotransmitter chemicals f Interruption in a myelin sheath, leaving axon exposed g Process that carries "outgoing" impulses h Branching at the end of the axon i Phospholipids insulating axons of some neurons j Branch of axon, usually at a right angle to the axon k Dark staining granules in soma 1. Collateral 2. Nucleus 3. Node of Ranvier (myelin sheath gap) 4. Axon hillock 5. Terminal arborizations 6. Dendrite 7. Soma 8. Myelin 9. Terminal bouton (axon terminal) 10. Axon 11. Nissl bodies 2 Using the word bank listed above, draw a myelinated multipolar neuron and label all the parts listed.
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Column A Column B a. Astrocyte b. Axon c. Collateral d. Dendrite e. Myelin f. Neurilemma g. Neurofibrils h. Nissl bodies (chromatophilic substance) i. Unipolar neuron _______ 1. Sheath of Schwann cell containing cytoplasm and nucleus that encloses myelin _______ 2. Corresponds to rough endoplasmic reticulum in other cells _______ 3. Network of threadlike structures within cell body and extending into axon _______ 4. Substance of Schwann cell composed of lipoprotein that insulates axons and increases impulse speed _______ 5. Neuron process with many branches that conducts an action potential (impulse) toward the cell body _______ 6. Branch of an axon _______ 7. Star-shaped neuroglia between neurons and blood vessels _______ 8. Nerve fiber arising from a slight elevation of the cell body that conducts an action potential (impulse) away from the cell body _______ 9. Possesses a single process from the cell body
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1. The skeletal muscles are controlled by the autonomic nervous system. 2. What is the function of the oligodendrocytes? - Create myelin layer - Clean up cellular debris - Supply blood and nutrients - Alert the body to an infection 3. The cells that make up the nervous system are called neurons. 7. The chemical that moves from the axon of one neuron across a gap to the dendrite of another is a neurotransmitter. 8. White matter appears white due to myelin. 9. A threshold stimulus results in the creation of an action potential. 4. What ions are necessary for a nerve impulse to occur? - Carbon and sodium - Oxygen and carbon - Potassium and sodium - Hydrogen and potassium 10. Reflexes (such as the knee-jerk reflex) occur when impulses travel from the muscle to the spinal cord and then back to the muscle. 5. Gaps between the myelin sheath along an axon are called nodes of Ranvier. 11. Which cell connects neurons to blood vessels? - Astrocyte - Oligodendrocyte - Glial - Myelin
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