Neurons create extensive communication networks throughout the nervous system. c) Neurons are the most abundant type of cell in nervous tissue. Briefly describe 6 effects this division has on the body. b. Epigenetics Multiple sclerosis (MS) is a disease in which the myelin sheaths are destroyed. c. cause imbalance. 45. depression would be an example of: (1991) finds that the CA1 neuron exhibits trains of action potentials when a small current (< 1 nA) is applied to the soma, but a full calcium spike and burst followed by trains of action potentials when the same small current is applied to . b. prevent electrical impulses from traveling down axons. Which of the following is not a function of astrocytes? b. glial cells. a. c. end terminus. The term central nervous system refers to the ________. D) voltage regulated repolarization, Neuroglia that control the chemical environment around neurons by buffering potassium and recapturing neurotransmitters are ________. When excited electrically, the Hg atoms emit UV light, which excites the phosphor coating of the inner tube, which then emits visible (white) light. This results in increased speed of impulse propagation. They conduct impulses. It is shown that localized co-injection of lidocaine derivative QX-314 and receptor agonists is able to block cold sensitivity in mice in a targeted way, with implications for treating cold pain associated with injury and disease. d. acetylcholine. 1. B) the Na ions have been pumped back into the cell True or False, Some neurotransmitters can be either excitatory or inhibitory depending upon the receptor. a. medulla. b. medulla. c. decrease the activity of postganglionic parasympathetic neurons. The correct answer is (d) All of these are characteristic of neurons. Which of the following is not characteristic of neurons? d. Polymorphism, 50. 74. ________ is a disease that gradually destroys the myelin sheaths of neurons in the CNS, particularly in young adults. 7. What are the possible responses? A drug that increases appetite would likely affect: Anatomy and Physiology questions and answers. Do not divide - (neural stem cells are an exception) 3. A. Myelin insulates neurons, keeping them at a high enough temperature to function well. The part of a neuron that conducts impulses away from its cell body is called a(n) ________. A person suffering from an inability to speak the word she intends to say, sometimes c. somatic nervous system. b. increased heart rate. Which of the following is NOT a function or characteristic of neurons? 75. The latter from the brain to the spinal cord. b. Somatic Nervous System b. sulci. Damage to the ________________ could cause changes to one's motivation to eat, such as D) positively charged and contains more sodium. Which of the following is an excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle? conditions in Russian society that led to the Revolution of 1917. Which of the following is false or incorrect? They are like neurons except that they lack axons. Which pattern of neural processing is important for higher level mental processing such as problem solving? b. Somatics c. sleepiness. a. Oligodendrocytes c. a Mendelian disease. Which of the following statements is true? 10 Characteristics Of Neurons (Nerve Cells) and Nervous System - 8SA.NET c. a ventricle. High metabolic rate C. Require continuous supplies of glucose and oxygen D. Extreme longevity E. No exceptions; all of these are characteristic of neurons. b. ANS stimulation of involuntary effectors is always excitatory. c. striations present are due to the orderly arrangement of actin and myosin. a. Multi-polar neurons b. Bipolar neurons c. Uni-polar neurons. Which of the following membrane regions would have significant numbers of voltage-gated ion channels? Longevity 2. Indicate the number of orbitals in the 6p sublevel. Diminished activation of postganglionic sympathetic neurons d . Chapter 11 Test Questions Flashcards | Quizlet a. Autonomic pathways consist of two types of motor neurons. IJMS | Free Full-Text | Low Basal CB2R in Dopamine Neurons and - MDPI Which of the following surrounds PNS neurons and provides support? d. ribosome transcription. Hepatocytes and neurons express low baseline CB1R and CB2R, respectively, and their cell-type-specific functions are not well defined. c. The cerebral cortex includes the cerebellum. 47. Generally, these traits are not determined by just one gene, but instead by the cumulative effect . c. Oligodendrocytes c. it increases flow to highly active neurons. Which of the following statements most accurately describes the effects caused by binding of the neurotransmitter (green dots) to the structure labeled C? a. regenerating axons may be unable to regain previous connections through the site of injury. Neurons are found across the body but are most numerous in the brain. What should the nurse explain to the patient regarding the role of serotonin and depression? There are three types of neurons. B) microglia If a neuroscientist described a structure as more lateral to a particular area, this means that: 28. C) An excitatory postsynaptic potential occurs if the excitatory effect is greater than the inhibitory effect but less than threshold. What type of motor neuron stimulates skeletal muscle fibers to contract by the excitation contraction mechanism? d. Sensory efferent neurons po. C) serotonin D) spinal cord and spinal nerves, The substance released at axon terminals to propagate a nervous impulse is called a(n) ________. d. Sympathetic ganglion, 24. a. that a person will have a polymorphism. 31. d. Autonomic Nervous System, 21. b) Neurological cells protect and support neurons. 58. Many drugs that produce highly enjoyable effects likely do so by affecting the: Neurons may be classified according to several characteristics. B. Myelin prevents the conduction of electricity from the axon hillock to the axon terminal. A disease that destroyed astrocytes would be expected to: ce3z/(4zi)3dz_ce^{3z}/(4z-i)^3dz d. M1 microglial cells. 23 We detected neurons and extracted temporal components from the calcium imaging data (Figure 2 C) with the CNMF-E toolbox. Damage to the hypothalamus may alter someone's motivation to eat. STRUCTURAL FUNCTIONAL CHARACTERISTICS OF NERVOUS AND GLIAL CELLS. a. Mitochondria in a neuron would no longer function. The synapse more common in embryonic nervous tissue than in adults is the ________. threshold Voltage-gated Na+ ATP neurotransmitters have what basic effect on the body? 25 26 Which of the following is not a special characteristic of neurons How can a single axon respond to several different kinds of events? a. on dendrites. Site of mRNA translation for proteins of the axolemma c. Axon fibres are covered by a white sheath called myelin. c. neurons. The preclinical phase of AD, which can last 10 to 20 years, is characterized by the gradual accumulation of -amyloid and tau aggregates in the brain, together with neuroinflammation and synaptic alterations ().Several lines of evidence indicate that -amyloid deposition precedes . What are the small lower motor neurons that innervate intrafusal muscle fibers that are part of specialized stretch receptors called? 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. b. hypothalamus. The prefrontal cortex is important for working memory function. ce3z/(4zi)3dz. A neuron was found to originate in the hippocampus and terminate in the prefrontal cortex. An inhibitory postsynaptic potential (IPSP) is associated with ________. d. astrocytes. C) calcium a. ribosomes. a. receives input from sensory neurons b. directs activity of motor neurons that innervate muscles and glands c. contains association neurons within the brain and spinal cord d. conta, Which of the following is not a function of astrocytes? The axon c. The dendrites d. The Nissl bodies. Differentiate the actions and chemical messengers in the endocrine system from those in the nervous system. E) provide the defense for the CNS, Which of the choices below describes the ANS? Sensory and motor divisions. 55. Integrate. b. B) are found on "pathfinder" neurons The human body is made of about 100 billion neurons. likely to occur? Although neurologic recovery is complete, amnesia for the event persists. A. (a) They conduct impulses. 27. C) neurolemma Write a paragraph describing the Structural Functional Characteristics of Nervous and Glial Cells Which of the following is not characteristic of neurons? (a) They 13. She asks the nurse,"Why did this have to happen to me again? Relative to the central nervous system, motor neurons are referred to as afferent neurons. If a drug severely depressed the functioning of the medulla, which of the following might be motor fibers that conduct nerve impulses from the CNS to smooth muscle, cardiac muscle, and glands. negatively charged and contains less sodium. The period after an initial stimulus when a neuron is not sensitive to another stimulus is the ________. d. frontal lobe. The characteristic neurologic picture including loss of consciousness, temporary respiratory arrest, and loss of reflexes. a. the hippocampus. The patient is noncompliant and needs additional monitoring. The actual cause of the neurodegenerative component of the disease is however unclear. c. Motor neurons. a. epigenetics. Which of the following is NOT a characteristic of neurons? A) They have Transcribed image text: Which of the following is not a characteristic of neurons? B) Specific potassium gates will open. d. Neurons. The axon hillock is located: capacity of divide via mitosis due to absence of centrosomes. a. Astrocytes B) amino acid c. Hypoglossal nerve The all-or-none phenomenon as applied to nerve conduction states that the whole nerve cell must be stimulated for conduction to take place. 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. What is the functional neuron type that is the most prevalent in the CNS? A) the impulse would move to the axon terminal only What are the different types of neurons in the ANS and where are they located? 1.Sensory. Chapter 2: The Nervous System Flashcards | Quizlet c. interneurons make inhibitory connections with damaged neurons. Inhibitory postsynaptic potentials (IPSPs) are "firing," but due to the neurotransmitter released and its action, the postsynaptic neuron is inhibited from "firing" (hyperpolarized). A) They conduct impulses. The substance released at axon terminals to propagate a nervous impulse is called a(n) ________. The nervous system most dominant while relaxing is the: 53. Which of the Following Is Not a Characteristic of Neurons A) senses changes in the environment b. the medulla. What are the different classes of neurons and their functions?
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