Pearson eText Biology: Science for Life -- Instant Access (Pearson+)
6th Edition
ISBN: 9780135214084
Author: Colleen Belk, Virginia Maier
Publisher: PEARSON+
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Chapter 24, Problem 6LTB
Summary Introduction
Introduction:
Myelin is a layer of insulation or sheath around the nerves. They are made up of lipids and fats. It consists of fatty and protein substances. This myelin sheath permits electrical impulses to transfer rapidly and efficiently alongside the nerve cells.
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Chapter 24 Solutions
Pearson eText Biology: Science for Life -- Instant Access (Pearson+)
Ch. 24 - Prob. 1LTBCh. 24 - How do sensory, motor, and interneurons differ?Ch. 24 - What are the general senses?Ch. 24 - Which brain structure controls language, memory,...Ch. 24 - Prob. 5LTBCh. 24 - Prob. 6LTBCh. 24 - Prob. 7LTBCh. 24 - Neurotransmitters. ___________. are electrical...Ch. 24 - The effects of a neurotransmitter could be...Ch. 24 - Prob. 10LTB
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- ___________ are called “downers” because they depressthe central nervous system.arrow_forwardGrey matter of nerve tissue in a region or collection of nerve cell bodies whose main function is to transmit nerve impulses from one region of the nervous system to another. True or Falsearrow_forwardTrue or False: Nerves are classified as cranial or spinal depending on whether they arise from the brain or the spinal cord.arrow_forward
- Select the correct answer to complete the statement: "Neuronopathy leads to" O Axon degeneration as well as loss of the myelin surrounding it, but the neuronal cell body remains intact O Neuron loss is irreversible and includes degenerationo of all its cytoplasmic contents, dendrites, axons and myelin sheath. O Seperation of the myelin lamellae or the selective loss of myelin (demyelination) Interference with neurotransmissionarrow_forwardTHE THORACIC DUCT LIES BETWEEN __________ AND___________ NERVE.arrow_forwardFill in the blank: The difference in electrical charge between the inside and the outside of a nerve cell membrane is called the_______________________ potential.arrow_forward
- Definition Correct Answer Possible Answers abnormal condition or disease ___________________ hypo- abnormal softening ___________________ -itis deficient, decreased ___________________ -malacia inflammation ___________________ -necrosis tissue death ___________________ -osisarrow_forwardPart One: The story begins with Synapse Action potential travels down the axon and reaches the synaptic bulb. _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____ Acetylcholine (ACH) diffuses across the synaptic cleft and binds to receptors. Calcium rushes into pre-synaptic terminal and initiates exocytosis. Electric current from action potential open up voltage gated calcium channels. ACH receptors open the associated gated channels (Na+ gated channels) Na+ rushes through the open channels into the muscle cell causing a large depolarization. Neurotransmitter (from the synaptic vesicles) is released into the cleft. After the initial depolarization of the muscle cell, the muscle cell releases Acetylcholinesterase (ACHE). The electric current in the T-tubules shocks the sarcoplasmic reticulum (opening voltage gated calcium channels) and causes calcium to spill into the cytoplasm of the muscle cell. ACHE begins to destroy the ACH in the synaptic cleft. The wave of…arrow_forwardCorrect explaination answerarrow_forward
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