D) generator potential. C) anchor neurons to blood vessels b. increased heart rate. b. Somatics (a) Cell body (b) Dendrites (c) Axon (d) All of the above are structural features of a neuron. They may live as long as the organism they are part of, and they have an exceptionally high metabolic rate, requiring large amounts of glucose and oxygen to produce ATP. (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 . There are two basic neuron-containing systems: the central nervous system (CNS), which includes the spinal cord and brain, and the peripheral nervous system (PNS), which includes all other nerve tissues. Just from looking down a microscope, however, it becomes very clear that not all neurons are the same. C. Afferent. a. Sensory neurons. D) glial cell, Saltatory conduction is made possible by ________. A. Sensory. However, the electrical impulses cannot pass directly from a nerve cell to the skeletal muscle cells to excite them. A neuron was found to originate in the hippocampus and terminate in the prefrontal cortex. The cell body is the metabolic center of the neuron. b. Ventral root Which of the following is not a characteristic of ion channels? It is impossible in a single chapter to delineate comprehensively the extensive structural, topographical and functional variation achieved by this cell type. Select the correct statement about serial processing. These neurons are inhibitory neurons, meaning they release neurotransmitters that keep other neurons from firing. The axon c. The dendrites d. The Nissl bodies. Which of the following is NOT a function or characteristic of neurons? Which of the following statements is true? copyright 2003-2023 Homework.Study.com. Which of the following is not a chemical class of neurotransmitters? Begin by sketching the contour. How are women stereotyped by men in Lamb to the Slaughter by Roald Dahl? the membrane potential has been reestablished. Sensory and motor divisions. b. Their basic function is to receive and transmit information through electrical impulses. Which of the following is NOT a function or characteristic of neurons? B) anchor neurons to blood vessels 8. B) nerves a. forebrain. Which of the following is the study of mechanisms of gene expression not involving Relative to the central nervous system, motor neurons are referred to as afferent neurons. c. Motor neurons. d. cerebellum. A thirestold potential must be excecded or reached. The contractions of skeletal muscles pull on tendons and move bones of the skeleton. B) norepinephrine The GBA gene encodes the lysosomal enzyme glucocerebrosidase (GCase). b. Preganglionic neurons are short and synapse in ganglia located near the spinal cord. a. A) release nerve growth factor ce3z/(4zi)3dz_ce^{3z}/(4z-i)^3dz Which of the following is not a function of astrocytes? The actual cause of the neurodegenerative component of the disease is however unclear. are crucial for the development of neural connections. a. it provides a protective cushion for the brain. Define neurotransmitter. The majority of these axonal knobs are shown to be "firing." Allow ions to move in and out of its cellular membrane. A) ion hippocampus, which of the following would most likely be the result? Answer: Option D is correct Explanation: Neurons generally do not e . Strong stimuli cause the amplitude of action potentials generated to increase. a. Multi-polar neurons b. Bipolar neurons c. Uni-polar neurons. d. Sensory, Which neuron structure receives impulses from the preceding cell? The nucleus accumbens facilitates fear and aggression. Required fields are marked. See Page 1. c) Myelin traps sodium ions on the axon an. To which part of the spinal cord is sensory information sent? 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? Which cell causes endothelial cells to fit closely together? All rights reserved. A) acetylcholine analyzes sensory information, stores information, makes decisions. C) oligodendrocytes a. the hippocampus. 59. d. Vagus nerve. Which of the following is an EXCITATORY neurotransmitter secreted by motor neurons innervating skeletal. b. increasing glial scarring. Motor neurons transmit the nerve impulses from CNS to effectors (muscles and glands). Which nervous sytem is responsible for delivering voluntary motor signals from the CNS to Sympathetic nervous system neurons contact muscle tissue at neuromuscular junctions. a. medulla. a. c. enhance the activity of reactive astrocytes. The sheath of Schwann is also called the ________. 40. a. Basal ganglia b. astrocytes respond to injury. b. Glossopharyngeal nerve d. pineal gland. B) oligodendrocytes a) axon b) axon hillock c) dendrites d) soma, Which of the following is not a structural feature of a neuron? Show the details. c. preganglionic terminals. However, the resting membrane potential in three types of neurons was not significantly different in the present study; therefore the 5-HT . b. polymorphism. a. corpus callosum. B) innervation of cardiac muscle In what way does the interior surface of a cell membrane of a resting (nonconducting) neuron differ from the external environment? c. neurotrophins. d. M1. B) A nerve impulse occurs if the excitatory and inhibitory effects are equal. c. Motor efferent neurons possess long dendrites and short axons. A) ependymal cells A patient is admitted to the hospital with exacerbation of multiple sclerosis (MS). A. astrocytes B. ependymal cells C. microglia D. Schwann cells, Which of the following options is correct? c. The person would later be unable to recall events that took place for some period of time after 2. A) nuclei Saltatory conduction is made possible by ________. This area is also known as the soma or perikaryon. B) excitatory potential 68. A scientist who wanted to determine how inflammation in the brain was occurring in a B) provide the defense for the CNS Glial scars may impair recovery from brain injury because: If an experimental drug produced physiological effects similar to nitric oxide, then a 43. These include nerve cells (or neurons) and glial cells (or glia ). Multiple sclerosis (MS) is a disease in which the myelin sheaths are destroyed. 38. D) positively charged and contains more sodium. It is the main component of the nervous system- both the central nervous and peripheral nervous system. Which of the following cells are not found in a connective tissue? Neurons are relatively small, simple-structured cells. The pons is activated when someone startles. d. Neurotransmission from the neuron would increase. Which of the following is false or incorrect? a. motor fibers that conduct nerve impulses from the CNS to smooth muscle, cardiac muscle, and glands. 27. Schwann cells are functionally similar to ________. What mechanism is responsible for axonal transport? sure to include the influence of German philosopher Karl Marx in Cold sores on the skin of the mouth occur when herpes simplex viruses that are dormant in neural ganglia become active and travel to the skin of the mouth. Which of the following are afferent neurons, relative to the central nervous system? Neurons are responsible for transmitting signals throughout the body, a process that allows us to move and exist in the world around us. Describe annual cleanupthat isfrequently present in these agreements. Cell bodies of sensory neurons may be located in ganglia lying outside the central nervous system. Nanoscale integrated circuit technologies have become popular for designing and implementing biologically inspired pulse-based brain systems [1].These advanced Nanoscale devices are implemented in specific defined models of neuronal recording [[2], [3], [4]].Especiallyto replace a dead neuron system with an artificial neuron system to activate the paralyzed body parts. D. Association Central Nervous System. Which nerve cells carry impulses from the brain to the muscles? Longevity 2. The thalamus routes all types of sensory information except: Which of the following is NOT characteristic of nervous tissue in the brain a. Neurons are a type of cell and are part of the nervous system. Although neurologic recovery is complete, amnesia for the event persists. a) The preganglionic neuron (sometimes called the ganglionic neuron), is the first motor neuron. O They have extreme longevity. While taking notes in class, a student had keep in mind what the professor had just stated in a. Pupil dilation What is a credit line? B) microglia C) They are mitotic. In two words, the functions of neuron tissue that we can specify is that the integration, and communication are the main function of this specialized tissue. D) Schwann cell, Which ion channel opens in response to a change in membrane potential and participates in the generation and conduction of action potentials? An anesthetic protocol allowing electrophysiological singleunit recordings from inhibitory, presumably GABAergic PC interneurons in vivo is developed and may be useful for evaluation of PC neurons in kindled rats. 46. 3. 1.Introduction. The STN also forms a reciprocally connected network with the GABAergic external globus pallidus that converges onto common basal ganglia output neurons. A) ependymal cells D) They are short-lived. In the presence of invading microbes, microglial cells become macrophages to phagocytize the microbes and neuronal debris. b. the structure is closer to the midline of the brain. 31) Neurons may be classified according to several characteristics. A) cholinesterase 12. 4. It also affects your cerebellum, the part of your brain that controls movement and balance. a. regenerating axons may be unable to regain previous connections through the site of injury. a. synapses. A) They conduct impulses. A) They conduct impulses. Myelination of the nerve fibers in the central nervous system is the job of the oligodendrocyte. Polygenic inheritance is the inheritance of traits that are influenced by multiple genes. 53. A) An inhibitory postsynaptic potential occurs if the inhibitory effect is greater than the excitatory, causing hyperpolarization of the membrane. b. Myelin prevents conduction of electricity from the axon hillock to the axon terminal. True or False, Some neurotransmitters can be either excitatory or inhibitory depending upon the receptor. B) They can form on receptor endings. What symptoms would a nurse focus on in his or her care of a patient with multiple sclerosis? What process does this interfere with and what would be the consequence? 1. b. Axon and soma d. Neurotrophins. Which nervous system was the drug most B) repolarization C) microglia Oligodendrocytes form and maintain the blood-brain barrier. A substance that inhibits the activity of the cerebellum would be expected to: A) postsynaptic potential Expert Answer. A) short distance hyperpolarization Relative to the prefrontal cortex, the neuron would be called a(n): b. auditory information. a. inhibit the production of neurotrophins. A. B) type of stimulus receptor Collections of nerve cell bodies in the peripheral nervous system are called ________. c. It is avascular. a. Axons b. Neurons c. Neuroglia d. Synapses e. Type A fibers, Which of the following parts of a neuron contain excitable membranes? Different types of neurons include sensory, motor, and interneurons, as well as structurally-based neurons, which include unipolar, multipolar, bipolar, and pseudo-unipolar neurons. innervation of skeletal muscle. As a component of the hyperdirect and indirect pathways, the STN is important for constraining movement, thought, and emotion through synaptic excitation of GABAergic basal ganglia output neurons. c. a Mendelian disease. b. Microglial cells The principles outlined above can be applied to the neuron and its ionic contents.. True or False, If bacteria invaded the CNS tissue, microglia would migrate to the area to engulf and destroy them. negatively charged and contains less sodium. The membrane potential of the postsynaptic membrane changes. 15. d. endothelial cells., 2. c. Inhibited digestion A gap between Schwann cells in the peripheral system is called a(n) ________. a. extrapyramidal motor system. 74. What does myelin do for neurons? All preganglionic neurons in the ANS are cholinergic. d. M1 microglial cells. taking the substance. c. pons D) gamma aminobutyric acid, Which of the following describes the nervous system integrative function? Which of the choices below describes the ANS? (a . b. the blood-brain barrier O They conduct impulses. What quantity of mercury spills over when heated to 75.0C75.0{\degree} \mathrm{C}75.0C ? The autonomic nervous has control centers in the: The correct answer is (d) All of these are characteristic of neurons. to axon segment Axon segment c. Astrocytes If physicians found that inflammation had caused damage to the blood-brain barrier, which The importance of a stimulus is derived from the number of stimuli received from the same source. Classify Neurons by their Function. A) axon B) dendrite C) neurolemma DI) Schwann cell. d. proteins. They have extreme longevity. This disease causes gradual muscle stiffness . (d) All of these are characteristic of neurons. FUNCTIONS OF ORGANELL NEURONS<br><br>The nerve cell - neuron - is a structural and functional unit of nervous tissue. Which ion channel opens in response to a change in membrane potential and participates in the generation and conduction of action potentials? b. the medulla. In the case of nerve . A Pyrex container is completely filled with 275cm3275 \mathrm{~cm}^3275cm3 of mercury at 10.0C10.0{\degree} \mathrm{C}10.0C. What do ANS neurons regulate with regard to mechanical digestion? High mitotic rate B. The all-or-none phenomenon as applied to nerve conduction states that the whole nerve cell must be stimulated for conduction to take place. 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. innervation of glands. Write a paragraph describing the The comparison demonstrates that the suggested controller closely tracks the reference voltage than the . a. Astrocytes In which area of the neuron is an action potential initially generated? A postsynaptic potential is a graded potential that is the result of a neurotransmitter released into the synapse between two neurons. Why? d. ribosome transcription. 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? C) innervation of glands Is the information in this quote about afferent of efferent? Damage to the ________________ could cause changes to one's motivation to eat, such as Which type of microglial cells promote inflammation? Some neuroglia remove debris and foreign material from the nervous system. a. ______________ are chemicals that promote the growth and development of neurons. A) They increase amplitude as they move away from the stimulus point. Identify the neuron type described: Two functional neuron types that are structurally multipolar neurons. Which cranial nerve receives sensory information from the heart, liver, and intestines? 2. Similar to hormones, NO and CO promote longer-lasting effects by acting through intracellular second-messenger molecules. 13. C) They have an exceptionally high metabolic rate. ATP-dependent "motor" proteins such as kinesin, dynein, and myosin are responsible. b. c. reduced oxygen delivery to cells. What is the functional neuron type that is the most prevalent in the CNS? A) acetycholine Which of the following statements regarding nervous tissue is not true? D) They are mitotic. Image credit: iStockphoto. Which of the following is NOT characteristic of the sympathetic division of the autonomic nervous system? They conduct impulses. C) biogenic amine It impacts your spinal cord and the nerves that transmit and receive messages between your brain and the rest of your body. What structural classification describes this neuron? the somatic nervous system. D) ligand-gated channel, An impulse from one nerve cell is communicated to another nerve cell via the ________. B) Specific potassium gates will open. Answer (1 of 3): So a neuron is a specialized cell in the brain with certain characteristics. Oligodendrocytes form: c. Electrical impulses would be unable to travel down axons. If a physician identified her patient as a low drug metabolizer, which of the following is most a. other neurons b. muscles c. glands d. all of the above, All of the following are characteristics of sympathetic preganglionic neurons EXCEPT: a.
Hr21 Self Service Login Alh, Texas Southern University Sororities And Fraternities, Articles W
Hr21 Self Service Login Alh, Texas Southern University Sororities And Fraternities, Articles W