28. The insulating structures of the neuron are collectively called the the cells which form this insulating 'cover' are called A. nodes of ranvier : ranvier-epithelium B. myelin sheath : Schwann-cells C. axon boutons : bouton-socks D. synthesized colloquium : phase two-megocytes

28. The insulating structures of the neuron are collectively called the the cells which form this insulating 'cover' are called A. nodes of ranvier : ranvier-epithelium B. myelin sheath : Schwann-cells C. axon boutons : bouton-socks D. synthesized colloquium : phase two-megocytes

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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In a nerve cell, the function of the myelin is to Group of answer choices 1. increase the speed at which nerve impulses are carried away from the cell body. 2. receive impulses and conduct them to the cell body. 3. support and nourish the neuron. 4. attach the neuron to connective tissue. 5. conduct impulses away from the cell body.
The neuron consists of all of the following except: Question content area bottom Part 1 A. dendrites. B. cranial nerve. C. cell body. D. axon.
4. Which term describes the cell membrane potential of a neuron at rest? a. polarized b. depolarized c. hyperpolarized d. repolarized e. sympolarized
The axons of myelinated neurons are imbedded in a protective covering of A. Schwann cells B. gray matter. C. nodes of Ranvier D. synaptic knobs.
21. How does partial damage to the neuronal membrane lead to excessive amounts of neurotransmitter release? a. Sodium can freely enter the cell to depolarize it b. Potassium can freely enter the cell to depolarize it c. Chloride can freely exit the cell to depolarize it d. GABA receptors become blocked, preventing proper suppression e. Dopamine receptors become activated, exciting the neuron f. None of the above
The cells responsible for the transmission of the nerveimpulse are ________. a. neuronsb. oligodendrocytesc. astrocytesd. microglia
75. Nodes of Ranvier are ________ -Knots on the dendrites of neurons . -nodes where two cells connect. -gaps in he myelin sheath along the axon . -French jelly rolls.
54 MS is a disabling disease that disrupts the communication between the brain and the body when the immune system attacks the protective sheaths (myelin) of the axons. Which cells are likely involved in this process? Select one or more: O a. Astrocytes b. Вірolar cells O c. Oligodendrocytes d. Schwann cells O e. Microglia O f. Dendrites O g. Astroglia
Connects neurons to blood capillaries and help to exchange nutrients, oxygen, carbon dioxide, etc, between the blood capillary and neuron forming the blood-brain barrier. Select one: -Oligodendrocytes -Microglia -Ependymal cells -Schwann cells -Astrocytes
Match each type of neuroglial cell with its correct function._____ Schwann cells a. Phagocytic cells of the CNS_____ Ependymal cells b. Surround the cell bodies of_____ Microglial cells neurons in the PNS c. Create the myelin sheath in the PNS_____ Oligodendrocytes d. Anchor neurons and blood vessels, maintain extracellular nvironment around neurons, assist in repair of damaged brain tissue_____ Satellite cells e. Create the myelin sheath in the CNS_____ Astrocytes f. Ciliated cells in the CNS…
Which of the following is not a special characteristic of neurons? a. they are long-lived lasting an individual’s lifespan b. they are all amitotic c. they have a high metabolic rate d. all of the above e. none of the above
1 Which of the following rows correctly identifies the number that represents the location of the synapse, and the method of signal transmission across the synapse, respectively? a. Synapse Method of Transmission 1 Sodium and potassium ions b. Synapse Method of Transmission Neurotransmitters Synapse Method of Transmission 2 Sodium and potassium ions d. Synapse Method of Transmission 2 Neurotransmitters