a. the person had neurons that did not form correctly during neural development. When a sensory neuron is excited by some form of energy, the resulting graded potential is called a(n) ________. Question. A) They increase amplitude as they move away from the stimulus point. If a neuroscientist stated that a brain structure had efferent neurons, what can be concluded? Which of the following is false or incorrect? Answer (1 of 3): So a neuron is a specialized cell in the brain with certain characteristics. b. d. spines along dendrites. b) Myelinated axons transmit nerve impulses in the same manner as unmyelinated axons. Which of the following is not a function of the autonomic nervous system? A) Sensory neuron B) Motor neuron C) Interneuron D) All of the above. a. improve working memory. a) Neurons are specialized to conduct electrical impulses. After peripheral nerve injuries, damaged axons can regenerate but functional recovery is limited by the specific reinnervation of targets. capacity of divide via mitosis due to absence of centrosomes. c. interneurons make inhibitory connections with damaged neurons. d. RNA. The nervous system most dominant while relaxing is the: a. Dendrite b. In this issue, Zhao et al. Motor neurons transmit the nerve impulses from CNS to effectors (muscles and glands). certain disorder would most likely investigate which of the following? a. Schwann cells b. satellite cells c. microglia d. astrocytes e. oligodendrocytes f. ependymal cells. Which of the following is NOT a characteristic of epithelial tissue? mastering a&p- chapter 11 (part of 12) EXAM 5, Anatomy & Physiology Test 2: Tissues & Integu, UTA Biol 2458- A&P 2 Aranda Test review 1, Mastering Homework Questions and Notes: Actio, The Language of Composition: Reading, Writing, Rhetoric, Lawrence Scanlon, Renee H. Shea, Robin Dissin Aufses, Edge Reading, Writing and Language: Level C, David W. Moore, Deborah Short, Michael W. Smith. A neuron consists of a nucleus, a region of tissue that contains the cell body. B) muscle contraction would occur True or False, The autonomic nervous system is under voluntary control; whereas, the somatic nervous system is involuntary. d. cerebellum. B) hyperpolarization b. Which of the following is not found in the limbic system? All other trademarks and copyrights are the property of their respective owners. 1. Neurons require continuous and abundant supplies of oxygen, and cannot survive for more than a few minutes without it. 27. d. support and brace neurons. 29. b. Myelin prevents conduction of electricity from the axon hillock to the axon terminal. a. sensory neuron b. interneuron c. motor neuron d. gland e. muscle. c. that a person is genetically male. Neurons and muscle cells are considered excitable tissues because they do what? Neurons are relatively small, simple-structured cells. Neurons are the basic functional units of the nervous system, and they generate electrical signals called action potentials, which allow them to quickly transmit information over long distances. Which of the following is NOT a characteristic of the parasympathetic division? Which neurons belong to the efferent pathway? d. pineal gland. Relative to the prefrontal cortex, the neuron would be called a(n): Ganglia are on or near the target organ. What are the two(2) functional neuron types that are structurally multipolar neurons? c. Electrical impulses would be unable to travel down axons. Which of the following portions of the neuron transmits neurotransmitters? However, the electrical impulse cannot pass directly from a nerve cell to the skeletal muscle cells to excite them. A neuron is a cell that communicates with the brain. b. ANS stimulation of involuntary effectors is always excitatory. a. the classification is based on the number of processes extending from the cell body b. multipolar neurons have several axons and one dendrite c. most neurons in the; Which of the following neurons forms the blood-brain barrier? 20. D) control the chemical environment around neurons nervous system? The person may have constricted pupils. D) generator potential. a. alertness. c. Epigenetics likely acting upon? a. norepinephrine. People throughout history (has, have) been fascinated by the moon. Which of the following is correct? Specifically, combination therapy (simultaneous use of customized sub-perception field and paresthesia-based SCS) versus monotherapy (paresthesia-based SCS) was evaluated. 2003-2023 Chegg Inc. All rights reserved. Is the information in this quote about afferent of efferent? View the full answer. c) Myelin traps sodium ions on the axon an. 58. d. Parkinson's disease. D) the impulse would move to the axon terminal only, and the muscle contraction would occur, Which of the following neurotransmitters inhibits pain and is mimicked by morphine, heroin, and methadone? Choose the correct order of these events below. c. the thalamus. Sympathetic nervous system neurons contact muscle tissue at neuromuscular junctions. In the presence of invading microbes, microglial cells become macrophages to phagocytize the microbes and neuronal debris. Which of the following is NOT a function or characteristic of neurons? A) They conduct impulses. A. thow ion selectivity C. are gated A. A) origin of the stimulus Potentials that are short-lived, local changes in membrane potential that can be either depolarized or hyperpolarized are called ________ potentials. 25. A) efferent neuron Which of the following is not a function of the autonomic nervous system? b. thalamus. Has component cells designed for conductivity b. Which of the following statements is true of both membrane potential responses shown in the graphs? 6. The small layer of tissue surrounding the cerebral aqueduct in the brain is called: a. Sensory neurons. B) analyzes sensory information, stores information, makes decisions Citation 17 - Citation 21 However, the effect of CH on axonal plasticity within the white matter following ischemic stroke is not known in detail. motor fibers that conduct nerve impulses from the CNS to smooth muscle, cardiac muscle, and glands. b. inhibit axon growth. Integrate. B) amplify or enhance the effect of ACh formation. a. visual information. a. the thin filaments of smooth muscle fibers are attached to dense bodies. c. olfactory information. c. Myelin traps sodium ions in the axon and, What does myelin do for neurons? 57. Which of the following is expected to occur first if the membrane potential decrease shown in the graph on the left were to reach the threshold value indicated at ~ -55 mV? The latter from the brain to the spinal cord. In which area of the neuron is an action potential initially generated? 28. If a loud noise made you jump, which structure was most likely responsible for this b. Sensory afferent neurons possess long dendrites and short axons. The CNS contains about 100 billion neurons, on the periphery - about 25 million.<br><br>The neuron is covered by a membrane that forms a closed space . Which of the following is not characteristic of neurons. a. astrocytes play a role in neurotransmission. a. corpus callosum. D. Involved in fast-acting body control. b. Sensory afferent neurons possess long dendrites and short axons. Polygenic inheritance is the inheritance of traits that are influenced by multiple genes. Name the parts that comprise the elbow joint. 5. Neurons differ in their morphology and function. Which of the following is NOT characteristic of nervous tissue in the brain a. Group C fibers are not capable of saltatory conduction. Which of the following is not characteristic of neurons? b. However, the electrical impulses cannot pass directly from a nerve cell to the skeletal muscle cells to excite them. What is the role of calcium in synaptic activity? C) They increase amplitude as they move away from the stimulus point. a. microglial cells. B. Expert Answer. depolarized to Saltatory conduction is made possible by ________. True or False, Some neurotransmitters can be either excitatory or inhibitory depending upon the receptor. a. As specifically as you can, outline the steps you would take to insert and express the gene for a new, nutritious seed protein in wheat. a. it is not an increase in membrane potential b. causes the voltage of the internal membrane towards zero c. inside the membrane becomes more positive than resting potential d. lowers the probability of producing an action potential e. none of the above. Discover and discuss the meaning of dendrites, axon, membrane polarization, membrane depolarization, and synapses. D. They have an exceptionally high metabolic rate., These cells in the CNS have cilia that move in order to circulate cerebrospinal fluid ________. d. reduce cortical arousal. b. Neurons have . The pathogenesis of the sudden disruption of neurologic function is unknown; it probably involves dysregulation of the reticular activating system in . Why? a. epigenetics. In this study we evaluated if motor and sensory neurites have a substrate preference for laminin and . B) are found on "pathfinder" neurons What function is served by the increased axon diameter at the nodes of Ranvier? Neurotransmitters are chemical signals used as a means of communication. A. c. gamma aminobutyric. Then, underline the verb in parentheses that agrees with the subject. (a) microglia (b) oligodendrocytes (c) ependymal cells (d) astrocytes. C) Sodium gates in the membrane can open in response to electrical potential changes. The actual cause of the neurodegenerative component of the disease is however unclear. b) Myelin prevents conduction of electricity from the axon hillock to the axon terminal. From a historical standpoint, no other cell type has attracted as much attention or caused as much controversy as the nerve cell. We investigated here the direct and differential effects of inflammatory mediators on human neurons. d. medulla. According to the signal, carried by motor nerves to effector organs, the muscles and glands . D) ligand-gated channel, An impulse from one nerve cell is communicated to another nerve cell via the ________. Which of the following cells are not found in a connective tissue? Which of the following is NOT a function of astrocytes? A drug that increases appetite would likely affect: 15. c. the person had a past traumatic brain injury. 1 and Klioutchnikov et al. d. gyri. Resting potentials are not just characteristics of nerve cells; all cells in the body have resting potentials. Neurons may be classified according to several characteristics. d. represent a general decline of autonomic nervous system activity. a. Axons b. Neurons c. Neuroglia d. Synapses e. Type A fibers, Which of the following parts of a neuron contain excitable membranes? d. M1 microglial cells. What are the small lower motor neurons that innervate intrafusal muscle fibers that are part of specialized stretch receptors called? a. Mitochondria in a neuron would no longer function. A second nerve impulse cannot be generated until ________. The presence of at least one Y chromosome indicates: B) The release of neurotransmitter molecules gives cells the property of being electrically coupled. 30. Neurons are located both in the CNS and on the periphery. The sheath of Schwann is also called the ________. Which of the following mechanisms is most significant in returning Na+ and K+ concentrations to resting ionic conditions (from point D to point E)? Are most pedagogues more interested in automation or orthography? to axon segment Axon segment d. The blood-brain barrier, 17. c. they form an insulating material around axons. Immediately after an action potential has peaked, which cellular gates open? 55. C) found in ganglia DI) They have an exceptionally high metabolic rate. d. The cerebral cortex is found on the surface of the brain. Which of the following is not characteristic of neurons? What are the different types of motor neurons? B) the Na ions have been pumped back into the cell C) biogenic amine Events that occur during synaptic activity are listed here, but they are arranged in an incorrect order. A) mechanically gated channel a. Preganglionic neurons tend to be long, with the ganglion located in or near the effector target tissue(s). b. they prevent axons from re-growing. The hypothalamus is located in the: . C) negatively charged and contains more sodium Hint. Unipolar neurons have axons structurally divided into peripheral and central processes, Neurons in the CNS are organized into functional groups, If bacteria invaded the CNS tissue, microglia would migrate to the area to engulf and destroy them, The nodes of Ranvier are found only on myelinated, peripheral neuron processes. d. Neurogenetics. What are the basic divisions of the peripheral nervous system? 1. (d) All of these are characteristic of neurons. a. C) destroy ACh a brief period after its release by the axon endings A) postsynaptic potential Site of mRNA translation for proteins of the axolemma c. Axon fibres are covered by a white sheath called myelin. D) innervation of skeletal muscle, Collections of nerve cell bodies outside the central nervous system are called ________. muscles throughout the body? Which cell causes endothelial cells to fit closely together? a. basal ganglia C) voltage stimulus to initiate B) Ions always move passively across membranes. b. oligodendrocytes. 42. nervous system. Which of the following is not characteristic of neurons? Motor has two divisions: the somatic and autonomic. D) glial cell, Saltatory conduction is made possible by ________. B) short distance depolarization O They conduct impulses. Which of the following is not a structural feature of a neuron? The importance of a stimulus is derived from the number of stimuli received from the same source. 2 introduce new . a. that a person will have a polymorphism. 1. a) anchor neurons to blood vessels b) control the chemical environment around neurons c) Provide the defense for the CNS d) support and brace neurons e) guide the migration of young neurons, synapse. c. working memory. Which ion channel opens in response to a change in membrane potential and participates in the generation and conduction of action potentials? d. implicit memory. d . 32. c) Neurons are the most abundant type of cell in nervous tissue. A) acetylcholine For skeletal muscle cells to contract, they must be excited by motor neurons. c. Autonomic Nervous System Cerebrospinal is located in the following structures except: Oligodendrocytes form: D) astrocytes, Immediately after an action potential has peaked, which cellular gates open? Stimulation of initial axon segment the sympathetic division of the autonomic nervous system. B) Specific potassium gates will open. b. c. pineal gland. Although neurologic recovery is complete, amnesia for the event persists. c. The person may stop breathing. c. myelin around axons. E) nucleic acid. In addition to diffusion, what are two other mechanisms that terminate neurotransmitter activity? 10. A) ependymal cells A) the membrane potential has been reestablished b. Neurotrophins Two subtypes of motor neurons have been identified: inferior and superior. b. the structure is closer to the midline of the brain. Similar to hormones, NO and CO promote longer-lasting effects by acting through intracellular second-messenger molecules. c. Cerebellum B) called neuroglial cells A) They are short-lived. In what way does the interior surface of a cell membrane of a resting (nonconducting) neuron differ from the external environment? c. basal ganglia. Tell why you think so. 19.