which of the following is not characteristic of neurons?

a. 31. What are the functional classifications of neurons? d. cerebral blood vessels. b. oligodendrocytes. The synaptic cleft b. Anatomy and Physiology questions and answers. Glial scars may impair recovery from brain injury because: B) Schwann cells C. Myelin traps sodium ions in the ax. True or False, Large-diameter nerve fibers conduct impulses much faster than small-diameter fibers. However, the electrical impulse cannot pass directly from a nerve cell to the skeletal muscle cells to excite them. It is important when reducing any model to first identify these characteristic behaviours. Motor has two divisions: the somatic and autonomic. Diminished cerebral blood flow increases oxygen to neurons. A. excitability B. neurotransmitter production C. high energy needs D. capability of mitosis. a. other neurons b. muscles c. glands d. all of the above, All of the following are characteristics of sympathetic preganglionic neurons EXCEPT: a. What do neurons synapse with? C) proteins have been resynthesized High metabolic rate C. Require continuous supplies of glucose and oxygen D. Extreme longevity E. No exceptions; all of these are characteristic of neurons. The interior is ________. a. cerebral aqueduct. Neurons can function optimally for over 100 years. 19. Serotonin is a biogenic amine neurotransmitter widely distributed in the brain, where it plays a role in emotional behavior and helps to regulate the biological clock. d. RNA. Alzheimer's disease (AD) is a progressive neurodegenerative disorder with an increasing worldwide prevalence. Which neurons reside only within the CNS? The axon hillock is located: A) motor fibers that conduct nerve impulses from the CNS to smooth muscle, cardiac muscle, and glands a. efferent neuron b. afferent neuron c. association neuron d. glial cell, Which of the following is not characteristic of neurons? Central Nervous System Indicate the number of orbitals in the 6p sublevel. 6. the somatic nervous system. D) biogenic amine, A neuron that has as its primary function the job of connecting other neurons is called a(n) ________. Which of the choices below describes the ANS? 20. c. ventricles. FUNCTIONS OF ORGANELL NEURONS<br><br>The nerve cell - neuron - is a structural and functional unit of nervous tissue. Which of the following are true about neurons? d. reticular activating system. C) negatively charged and contains more sodium. Central Nervous System b. it provides a medium for nutrients to cells. What effect might a disease that destroyed oligodendrocytes have on neuronal function? A) acetycholine True or False, The autonomic nervous system is under voluntary control; whereas, the somatic nervous system is involuntary. A. (d) All of these are characteristic of neurons. Which of the following are afferent neurons, relative to the central nervous system? What are the basic divisions of the peripheral nervous system? In addition to diffusion, what are two other mechanisms that terminate neurotransmitter activity? a. a. alertness. It is composed of densely packed cells. a. anchor neurons to blood vessels. c. Neuromuscular junction (b) They have extreme longevity. Its cell body is in an autonomic ganglion outside the CNS. D) erratic transmission of nerve impulses, Which of the following is not a chemical class of neurotransmitters? (a) can maintain ionic balance of extracellular environment for neurons (b) can take glucose from blood to provide to neurons to make ATP (c) can take up neurotransmitter from a synapse (d) can phag, Which of the following are characteristics of myelinated axons? During depolarization, the inside of the neuron's membrane becomes less negative. D) Ions always move from an area of higher concentration to an area of lower concentration, A second nerve impulse cannot be generated until ________. Oligodendrocytes form and maintain the blood-brain barrier. 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 . _____________ is the study of how genes support the function of neurons. C) leakage channel The actual cause of the neurodegenerative component of the disease is however unclear. b. autosomal chromosomes. True or False, The overlapping functions of the nervous system are sensory input, integration, and motor output. B. Myelin prevents the conduction of electricity from the axon hillock to the axon terminal. In which area of the neuron is an action potential initially generated? a. impair memory. Visual disturbances, paralysis, and weakness, Elliot Aronson, Robin M. Akert, Samuel R. Sommers, Timothy D. Wilson, Elliot Aronson, Robin M. Akert, Timothy D. Wilson. c. sensory and motor neurons that su. That is, they have a single axon and many dendrites. 8. A) An excitatory postsynaptic potential occurs if the excitatory effect is greater than the inhibitory effect but less than threshold. Therefore, the axon can release one or more neurotransmitters simultaneously, creating singular or multiple events. innervation of skeletal muscle. True or False, The action potential is caused by permeability changes in the plasma membrane. _____________ is a process for responding to brain injury. An experimental drug that reduces the release of chemicals that inhibit axon growth may: This protective role is important because cells of the immune system are denied access to the CNS. 31) Neurons may be classified according to several characteristics. 64. a. Dendrites and axon a. messenger ribonucleic acid. The concentration of __ is higher outside than inside the cell. b. Neurotransmitters The parasympathetic nervous system prepares the body for rigorous activity. 1.Sensory. 18. A. Myelin insulates neurons, keeping them at a high enough temperature to function well. having a low appetite. Neurons are a type of cell and are part of the nervous system. Begin by sketching the contour. alternations to DNA sequences? d. pituitary gland. To which part of the spinal cord is sensory information sent? c. medulla. a. 32. a. ribosomes. Which of the following is not true about the cerebral cortex? C) receptor 49. When a sensory neuron is excited by some form of energy, the resulting graded potential is called a(n) ________. A) Group C fibers are not capable of saltatory conduction. The axon c. The dendrites d. The Nissl bodies. What does myelin do for neurons? Because all action potentials are alike, how does the brain separate situations that require immediate attention from ordinary "positional" reports? The comparison demonstrates that the suggested controller closely tracks the reference voltage than the . When the neurons were damaged, the number of Nissl corpuscles decreased significantly . The period after an initial stimulus when a neuron is not sensitive to another stimulus is the ________. Their basic function is to receive and transmit information through electrical impulses. Select the correct statement regarding synapses. b. cause inattention. B) amino acid a. Oligodendrocytes D) nitric oxide, Which of the following describes the excitatory postsynaptic potential? Like the heart, lungs, and stomach, the nervous system is made up of specialized cells. d. implicit memory. b. the medulla. The membrane potential of the postsynaptic membrane changes. In general, neurons cannot be replaced if destroyed. Which of the following statements is incorrect? An inhibitory intracellular matrix releases neurotrophins to impair axon re-growth. A. Myelin insulates neurons, keeping them at a high enough temperature to function well. B) excitatory potential d. The person would have dulled senses for some period of time after taking the substance. B. Myelin prevents the conduction of electricity from the axon hillock to the axon terminal. Its axon, the postganglionic axon, extends to the effector organ. When one or more presynaptic neurons fire in rapid order it produces a much greater depolarization of the postsynaptic membrane than would result from a single EPSP; this event is called ________ summation. 25. Which of the following is not true of graded potentials? d. inferior colliculus. a) norepinephrine b) cholinesterase c) gamma aminobutyric acid d) acetylcholine. A) Sensory neuron B) Motor neuron C) Interneuron D) All of the above. How can a single axon respond to several different kinds of events? ________ is a disease that gradually destroys the myelin sheaths of neurons in the CNS, particularly in young adults. c. M2 High mitotic rate B. Its structure is multipolar. c. It is avascular. d. a transcription factor. 70. O They have extreme longevity. Sympathetic nervous system neurons contact muscle tissue at neuromuscular junctions. a. synapses. In terms of function, scientists classify neurons into three broad types: sensory . 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. c. that a person is genetically male. Some ions are prevented from moving down their concentration gradients by ATP-driven pumps. Which of the following describes the ANS? The thalamus routes all types of sensory information except: Which of the following statements is true? 12. d. Polymorphism, 50. They have high energy requirements (about 20 per. Multiple Choice. 39. All preganglionic neurons in the ANS are cholinergic. d. Neurotransmission from the neuron would increase. a. Trigeminal nerve taking the substance. B) If a motor neuron in the body were stimulated by an electrode placed about midpoint along the length of the axon ________. C) brain and spinal cord a. Amygdala Saltatory conduction is made possible by ________. d. reduce cortical arousal. d. Cingulate cortex. Oligodendrocytes are a type of neuroglia. These K+ ions decrease the positive ion concentration momentarily below the normal -70mV and thus hyperpolarize the cell. Increased diameter results in increased surface area on the membrane for sodium channels. To reveal how individual NAc neurons respond to reward, we implanted gradient index (GRIN) lenses in the NAcLat and the NAcMed and recorded single-neuron calcium activity using a miniature head-mounted microscopy (Figures 2 A and 2B). It is impossible in a single chapter to delineate comprehensively the extensive structural, topographical and functional variation achieved by this cell type. a. regenerating axons may be unable to regain previous connections through the site of injury. Friedreich's ataxia is a rare disease that affects your central nervous system. a. Pons a. Preganglionic neurons tend to be long, with the ganglion located in or near the effector target tissue(s). a. extrapyramidal motor system. c. Inhibited digestion Touch stimulation of this sensory receptor will open the mechanically gated ion channels, but action potentials are still not initiated because propagation of an action potential requires the opening of voltage-gated Na+ channels. A. neuronal fibers; axons B. axons; dendrites C. dendr. Which of the following is not characteristic of neurons? Which of the following is NOT a function or characteristic of neurons? ce3z/(4zi)3dz. 5. C. They are mitotic. d. None of these are correct. c. midbrain. d. Hypothalamus, 37. Events that occur during synaptic activity are listed here, but they are arranged in an incorrect order. Which of the following is not a characteristic of ion channels? A) They are short-lived. b. Somatics which ofthe following is correct? Question. c. Epigenetics a. polymorphisms. 62. A) senses changes in the environment Write a paragraph describing the When information is delivered within the CNS simultaneously by different parts of the neural pathway, the process is called ________ processing. b. dorsal horn Imagine a neuron that has several hundred axonal knobs impinging on it. a) ion b) cholinesterase c) neurotransmitter d) biogenic amine. (a) They conduct impulses. If a person ingested a substance that temporarily impaired the functioning of the Study with Quizlet and memorize flashcards containing terms like 1. conditions in Russian society that led to the Revolution of 1917. Neuroglia that control the chemical environment around neurons by buffering potassium and recapturing neurotransmitters are ________. Which of the following is not true of graded potentials? a. improve working memory. Our experts can answer your tough homework and study questions. A) They increase amplitude as they move away from the stimulus point. b. thalamus. D. Skeletal muscles supports the weight of some internal organs. Ganglia are on or near the target organ. 24, 25 There were 255 and 319 . Cell bodies of sensory neurons may be located in ganglia lying outside the central nervous system. C) guide the migration of young neurons, synapse formation, and helping to determine capillary permeability Which of the following is not a function of astrocytes? C) serotonin B) voltage-gated channel Which of the following is NOT characteristic of the sympathetic division of the autonomic nervous system? 78. Diminished activation of postganglionic sympathetic neurons Different types of neurons include sensory, motor, and interneurons, as well as structurally-based neurons, which include unipolar, multipolar, bipolar, and pseudo-unipolar neurons. d. gyri. The synapse more common in embryonic nervous tissue than in adults is the ________. Which of the following will occur when an excitatory postsynaptic potential (EPSP) is being generated on the dendritic membrane? Group of answer choices: Neuroglia refer to neurons with axons coated in myelin. a. Oligodendrocytes Contains cells with macrophage activity c. Exhibits regenerative capacities d. Contains lymphatic vessel. The part of a neuron that sends neurotransmitters into a synapse is called a(n): 6. The significance of the myelin sheath surrounding axons of werve neurons is that ia is B. composed of synaptio vesieles, which corapletely botate the nouron due w ins whter dianecer. d. Sensory efferent neurons po. Which of the following is not a special characteristic of neurons? A. ependymal cells B. Schwann cells C . B) the Na ions have been pumped back into the cell certain disorder would most likely investigate which of the following? A gap between Schwann cells in the peripheral system is called a(n) ________. a. interneuron. b. cholinesterase. a. b. a Mendelian disease. The cell bodies of the upper motor neurons are located in the spinal cord B. This is an example of: D) potassium, Nerve cell adhesion molecules (N-CAMs) ________. D) They are mitotic. d . c. Myelination What two physiological characteristics are highly developed in the neurons? Motorneurons release acetylcholine at: d. Sympathetic ganglion, 24. 1. b. thalamus. Neurons are the cells that make up the brain and the nervous system. Learn about the neuron diagram, structure, and function. a. epigenetics. a. Oligodendrocytes e. neurons that innervate smooth muscle are under involuntary control. B They have extreme longevity. True or False, Some neurotransmitters can be either excitatory or inhibitory depending upon the receptor. Identify the neuron type described: A functional neuron type most prevalent in the CNS. Some neuroglia remove debris and foreign material from the nervous system. d. Activation of postganglionic parasympathetic neurons, 65. Sensory and motor divisions. a. increase the activity of postganglionic sympathetic neurons. to axon segment Axon segment Which of the following is not characteristic of neurons. Which of the following is NOT a characteristic of neurons? ATP-dependent "motor" proteins such as kinesin, dynein, and myosin are responsible. Damage to the hypothalamus may alter someone's motivation to eat. c. cause imbalance. Which of the following is not a characteristic of neurons? b) Myelinated axons transmit nerve impulses in the same manner as unmyelinated axons. A) sodium b. Neurons have . Reflexes are rapid, automatic responses to stimuli. c. in the synapse. Which of the following is NOT characteristic of smooth muscle? Neurons that carry impulses the central nervous system to the muscles or glands are called neurons or motor neurons. b. ventricles. When a sensory neuron is excited by some form of energy, the resulting graded potential is called a(n) ________. A. d. astrocytes. d. tremor. C) Group B fibers are highly myelinated and have the highest conduction velocities. She asks the nurse,"Why did this have to happen to me again? c. basal ganglia. According to the humidity characteristics of PEMFC, Vinu et al. B) large nerve fibers D) innervation of skeletal muscle, Collections of nerve cell bodies outside the central nervous system are called ________. It is the main component of the nervous system- both the central nervous and peripheral nervous system. d. Interneurons, 16. These include nerve cells (or neurons) and glial cells (or glia ). The function of neurons is to communicate information from one part of the body to other parts. 47. b. Myelin prevents conduction of electricity from the axon hillock to the axon terminal. 73. Name the two other neuron types which are cholinergic. Neurons are located both in the CNS and on the periphery. When excited electrically, the Hg atoms emit UV light, which excites the phosphor coating of the inner tube, which then emits visible (white) light. a. Mitochondria in a neuron would no longer function. The cerebral cortex is located in the forebrain. We investigated here the direct and differential effects of inflammatory mediators on human neurons. nervous system? 80. C) destroy ACh a brief period after its release by the axon endings B) norepinephrine A) long distance signaling Describe which neurons are considered cholinergic in both the parasympathetic and sympathetic divisions. If a neuroscientist stated that a brain structure had efferent neurons, what can be concluded? b. Somatic Nervous System It is concluded that motor and sensory axons have a different substrate preference at early postnatal stages but this difference is lost in the adult. How can potentially poisonous gases like NO and CO be used by the body? c. The person would later be unable to recall events that took place for some period of time after a. motor fibers that conduct nerve impulses from the CNS to smooth muscle, cardiac muscle, and glands. They secrete acetylcholine. 77. True or False, A postsynaptic potential is a graded potential that is the result of a neurotransmitter released into the synapse between two neurons. Which of the following cells are not found in a connective tissue? Integrate. C) sensory neurons that convey information from somatic receptors in the head, body wall, and limbs and from receptors from the special senses of vision, hearing, taste, and smell to the CNS Question. D) The synaptic cleft prevents an impulse from being transmitted directly from one neuron to another. 48. The importance of a stimulus is derived from the number of stimuli received from the same source. The substance released at axon terminals to propagate a nervous impulse is called a(n) ________. b. New three-photon miniature microscopes open the study of neuronal networks to those deep in the brains of behaving animals. d. hypothalamus. Schwann cells myelinate PNS axons. The p.N370S substitution causes a violation of the enzyme conformation, which affects its stability in the cell. Unipolar,Bipolar,Multipolar. They are robust signaling cells. Myelinated neurons conduct impulses faster than unmyelinated neurons because? Which of the following stimuli caused the reaction in the graph on the left? b. Sensory afferent neurons possess long dendrites and short axons. The cell body is the metabolic center of the neuron. 55. Which component has a role in the postsynaptic cell during synaptic activity? c. Generate ATP. A. b. medulla Which cells in the brain remove normal cellular waste? They conduct impulses. A patient was admitted for depression. Myelination of the nerve fibers in the central nervous system is the job of the oligodendrocyte, Efferent nerve fibers may be described as motor nerve fibers. A) Ions always move actively across membranes through leakage channels. The basal ganglia act to stabilize voluntary movements. Damage to the ________________ could cause changes to one's motivation to eat, such as B) A nerve impulse occurs if the excitatory and inhibitory effects are equal. b. lowers the probability of producing an action potential. B) oligodendrocytes cells would most likely be responsible? What type of channel on the postsynaptic membrane binds neurotransmitter? E) guide the migration of young neurons, synapse formation, and helping to determine capillary permeability. If a neuroscientist described a structure as more lateral to a particular area, this means that: Which of the following plays an integral role in saltatory conduction? Neurons: c. Dendrites and soma C) They have an exceptionally high metabolic rate. b. The part of the neuron responsible for receiving, integrating, and sending nerve impulses is the A. dendrite. help to circulate the cerebrospinal fluid. Neuroglia (a) conduct electrical impulses, (b) are nerve stem cells, (c) are support cells that aid neurons, (d) are an abnormal growth of neural tissue. a. reduced cerebrospinal fluid. 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. A chemical messenger that does not directly cause ESPSs or IPSPs but does affect the strength of synaptic transmission is a ________. b. Which of the following is false or incorrect? e. guide the migration of young neurons, syna, Which describes the function of dendrites? the sympathetic division of the autonomic nervous system. The person may have constricted pupils. Neurons are found across the body but are most numerous in the brain. While taking notes in class, a student had keep in mind what the professor had just stated in a. Hepatocytes and neurons express low baseline CB1R and CB2R, respectively, and their cell-type-specific functions are not well defined. The cerebral cortex has features called gyri and sulci. innervation of glands. Then, underline the verb in parentheses that agrees with the subject. (c) They have an exceptionally high metabolic rate. 43. Relative to the prefrontal cortex, the neuron would be called a(n): According to the signal, carried by motor nerves to effector organs, the muscles and glands . b. Constricted airways B) Ions always move passively across membranes. D) ligand-gated channel, An impulse from one nerve cell is communicated to another nerve cell via the ________. Motor. Which of the following is correct? likely true? C) ganglia C) the impulse would spread bidirectionally nervous system. o Neurons have a very long lifespan Have low mitotic activity fie cannot undergo cell division) O Ability to transmit electrical signals (i.e.