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Name: ___________________________________________ Date: ________ Nervous System – In Class Review Organization of the Nervous System Choose the best division of the nervous system to match the corresponding statement below. Key Choices Autonomic Nervous System Peripheral Nervous System (PNS) Central Nervous System Somatic Nervous System ___________________________1. Nervous system subdivision that composed of the brain and spinal cord ___________________________2. Subdivision of the PNS that controls voluntary activities such as the activation of skeletal muscles ___________________________3. Nervous system subdivision that is composed of the cranial and spinal nerves and ganglia ___________________________4. Subdivision of the PNS that regulates the activity of the heart and smooth muscle, and of glands. ___________________________5. A major subdivision of the nervous system that interprets incoming information and issues orders ___________________________6. A major subdivision of the nervous system that serves as communication lines, linking all parts of the body to the CNS Nervous Tissue – Structure and Function Correctly match the anatomical structure of a neuron with the correct function. ________________________ Releases Neurotransmitters Axon ________________________Conducts electrical currents toward the cell body Axon terminal ________________________ Increases the speed of impulse transmission Dendrite ________________________ Location of the nucleus Myelin sheath ________________________ Generally conducts impulses away from the cell body Cell body Using the key choices, select the terms that correctly match to the statements below: Key Choices Afferent neuron Neuroglia Proprioceptors Neurotransmitters Schwann Cells Nerve Synapse Efferent Neuron Nodes of Ranvier Stimuli Ganglion Nuclei Tract Interneuron Cutaneous Sense Organs _________________1. Sensory receptors found in the skin, which are specialized to detect temperature, pressure change, and pain _________________2. Specialized cells that myelinate the fibers of neurons found in the PNS _________________3. Junction or point of close contact between neurons _________________4. Bundle of nerve processes inside the CNS _________________5. Neuron, serving as part of the conduction pathway between sensory and motor neurons _________________6. Gaps in a myelin sheath _________________7. Collection of nerve cell bodies found outside the CNS _________________8. Neuron that conducts impulses away from the CNS to muscles and glands _________________9. Sensory receptors found in muscle and tendons that detect their degree of stretch _________________10. Changes, occurring within or outside the body, that affect nervous system functioning _________________11. Neuron that conducts impulses toward the CNS from the body periphery _________________12. Chemicals released by neurons that stimulate other neurons, muscles, or glands Figure 7-1 is a diagram of a neuron. First, label the parts indicated on the illustration by the lines. Then color in each of the structures listed below the designated colors. Next, identify the structural class of the neuron depicted in Figure 7-1. Last, draw arrows on the figure to indicate the direction of impulse transmission along the neuron’s membrane. Blue Red Green Orange Use the key choices, identify the terms defined in the following statements. Key Choices Action Potential Potassium Ions Sodium Ions Depolarization Refractory Period Sodium-potassium pump Polarized Repolarized __________________________1. Period of repolarization of the neuron during which it cannot respond to a second stimulus __________________________2. State in which the resting potential is reversed as sodium ions rush into the neuron __________________________3. Electrical condition of the plasma membrane of a resting neuron __________________________4. Period during which potassium ions diffuse out of the neuron __________________________5. Transmission of the depolarization wave along the neuron’s membrane __________________________6. The chief positive intracellular ion in a resting neuron __________________________7. Process by which ATP is used to move sodium ions out of the cell and potassium ions back into the cell; completely restores the resting conditions of the neuron.
