v Question Completion Status:A Moving to another question will save this response.Question 51The major two types of the cells in the central nervous system areO A. sensory and motor cellsO B. neurons and glial cellsO C. epitheilal and connective cellsO D. neurons and Schwann cellsA Moving to another question will save this response.escG Search or ty213.4.W

The central nervous system consists of the brain and spinal cord. The brain is the complex organ of…

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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

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

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Neurons have three main components. Describe the function of each one a. Dendrites b. Cell body c. Axon i. Myelin sheet
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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
n multiple sclerosis, which type of cell is attacked by the immune system, causing a deficiency of myelin on CNS axons?A: neuronB: microglial cellC: ependymal cellD: oligodendrocyte
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The walls of blood vessels in the brain are formed by cells that are very tightly packed. This arrangement of cells provides which of the following properties of most brain vasculature? a. efficient removal of waste products by blood systems b. rigidity and likelihood of stroke c. most large and charged molecules cannot move from the blood to the brain d. easy access to required blood chemicals such as glucose, oxygen, and various hormones What does it mean to say that acetylcholine exerts ionotropic effects? a. It opens ion channels. b. It increases the concentration of ions within the vesicles. c. It alters the permeability of the presynaptic neuron. d. It changes the electrical charge of sodium ions from positive to negative.
1. Transmitter substances a. may be inhibitory or stimulatory. b. change the permeability of postsynaptic cells. c. elicit graded potentials near the synapse. d. all of these 2. The major divisions of the peripheral nervous system are a. peripheral and central systems. b. afferent and autonomic systems. c. somatic and autonomic systems. d. sympathetic and parasympathetic systems. 3. At rest, a nerve cell has a high concentration of __________ inside and a high concentration of __________ outside. a. potassium; sodium b. acetylcholine; chlorine c. sodium; potassium d. phosphorus; calcium 4. Which of the following would NOT be defined as a part of the central nervous system? a. brain b. cerebellum c. spinal nerves d. neuroglia cells 5. The basic unit of the nervous system is a. a nerve impulse. b. the brain. c. neuroglia. d. the neuron.
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The major two types of the cells in the central nervous system are O A. sensory and motor cells B. neurons and glial cells OC. epitheilal and connective cells O D. neurons and Schwann cells