c. pons b. cerebrospinal fluid. b. motor fibers that conduct nerve impulses from CNS to skeletal muscles. b. cingulate cortex. Which of the following membrane regions would have significant numbers of voltage-gated ion channels? 2. Sensory Neurons Motor Neurons Inter-Neurons b. the person has a disease that affects myelin around axons. Which of the following stimuli caused the reaction in the graph on the left? Classify neurons according to their structure. Identify the following: Acetylcholinesterase would be found in the synapse between neurons for this branch of the ANS and the effector cells. A. 51. Neurons differ in their morphology and function. A) ependymal cells D) erratic transmission of nerve impulses, Which of the following is not a chemical class of neurotransmitters? Group of answer choices: Neuroglia refer to neurons with axons coated in myelin. 12. Growing numbers of sodium channels appear spontaneously in the demyelinated fibers so that conduction resumes, even if slower. In terms of function, scientists classify neurons into three broad types: sensory . Define neurotransmitter. a. Dendrites and axon A. thow ion selectivity C. are gated A. Which pattern of neural processing is important for higher level mental processing such as problem solving? Motor has two divisions: the somatic and autonomic. Answer: Option D is correct Explanation: Neurons generally do not e . order to draw a diagram in her notebook. Which nervous system was the drug most 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. B) large nerve fibers B) repolarization C) biogenic amine What are the two(2) functional neuron types that are structurally multipolar neurons? 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. Mountainside's local landscaping business totaled approximately $789,400 in sales for the year. a. Trigeminal nerve b. Interneurons. 61. d. Neurogenetics. What is the direct role of neurotransmitter at a chemical synapse? D. Association Central Nervous System. B) A nerve impulse occurs if the excitatory and inhibitory effects are equal. What do ANS neurons regulate with regard to mechanical digestion? 3 special characteristics of neurons. C) association neuron In epilepsy research, there is a growing interest in the role of the piriform cortex (PC) in the development and maintenance of limbic kindling and other types of limbic . c. The patient has a low level of transcription factors. A Pyrex container is completely filled with 275cm3275 \mathrm{~cm}^3275cm3 of mercury at 10.0C10.0{\degree} \mathrm{C}10.0C. A. Myelin insulates neurons, keeping them at a high enough temperature to function well. a. on dendrites. a. A) cholinesterase That part of the nervous system that is voluntary and conducts impulses from the CNS to the skeletal muscles is the ________ nervous system. What are ciliated CNS neuroglia that play an active role in moving the cerebrospinal fluid called? B) muscle contraction would occur 64. 3. Which of the following is true about the movement of ions across excitable living membranes? c. decrease the activity of postganglionic parasympathetic neurons. to axon segment Axon segment Which of the following is false or incorrect? B) Group A fibers are mostly somatic sensory and motor and are the smallest in diameter. Which of the following is NOT characteristic of the sympathetic division of the autonomic nervous system? a. the person had neurons that did not form correctly during neural development. d. increased protection of the brain. c. Myasthenia Gravis. 33. b. Somatics A neuron was found to originate in the hippocampus and terminate in the prefrontal cortex. The concentration of __ is higher inside than outside the cell. A patient is admitted to the hospital with exacerbation of multiple sclerosis (MS). b. transcription factors. A) Sensory neuron B) Motor neuron C) Interneuron D) All of the above. FUNCTIONS OF ORGANELL NEURONS<br><br>The nerve cell - neuron - is a structural and functional unit of nervous tissue. Oligodendrocytes form: 73. A) nuclei High metabolic rate C. Require continuous supplies of glucose and oxygen D. Extreme longevity E. No exceptions; all of these are characteristic of neurons. A) They are short-lived. D. They have an exceptionally high metabolic rate., These cells in the CNS have cilia that move in order to circulate cerebrospinal fluid ________. Which of the following correctly describes a graded potential? Study with Quizlet and memorize flashcards containing terms like 1. a. impair memory. A) ion A) axon If the electrode is removed, a potential of zero is recorded again. a. To find the time when this object reaches the position x=0x=0x=0 we can use the quadratic formula, or apply the following two-step procedure: (a) Use Equation v2=v02+2a(xx0)=v02+2axv^2=v_0^2+2 a\left(x-x_0\right)=v_0^2+2 a \Delta xv2=v02+2a(xx0)=v02+2ax to show that the velocity of the object when it reaches x=0x=0x=0 is given by v=v022ax0v=\pm \sqrt{v_0^2-2 a x_0}v=v022ax0. GABA and glycine are amino acid neurotransmitters; dopamine and norepinephrine are catecholamines; and endorphin and enkephalin are peptide transmitters. The person would have impaired decision making while the drug's effects were active. This may account for the cycles of relapse and remission in different patients. Although neurologic recovery is complete, amnesia for the event persists. Which of the following statements is incorrect? b. Glossopharyngeal nerve Cedric S Raine. A) motor neurons Which of the following are true about neurons? 53. As you start working out, you notice that your heart rate and breathing rate start to increase. 78. What are the functional classifications of neurons? During depolarization, the inside of the neuron's membrane becomes less negative. The cell body is the metabolic center of the neuron. B They have extreme longevity. b. cholinesterase. c. The person may stop breathing. c. cause the release of neurotrophins. What are the basic divisions of the peripheral nervous system? If a physician identified her patient as a low drug metabolizer, which of the following is most The actual cause of the neurodegenerative component of the disease is however unclear. Just from looking down a microscope, however, it becomes very clear that not all neurons are the same. A) An excitatory postsynaptic potential occurs if the excitatory effect is greater than the inhibitory effect but less than threshold. D) They have an exceptionally high metabolic rate. b. Broca's Aphasia. Schwann cells myelinate PNS axons. Why? The majority of these axonal knobs are shown to be "firing." A stimulus traveling toward a synapse appears to open calcium ion channels at the presynaptic end, which in turn promotes fusion of synaptic vesicles to the axonal membrane. B. Myelin prevents the conduction of electricity from the axon hillock to the axon terminal. 23 We detected neurons and extracted temporal components from the calcium imaging data (Figure 2 C) with the CNMF-E toolbox. c. Motor efferent neurons possess long dendrites and short axons. Enkephalins and endorphins are peptides that act like morphine. Sympathetic nervous system neurons contact muscle tissue at neuromuscular junctions. 12. Neurons are located both in the CNS and on the periphery. This results in increased speed of impulse propagation. d. Vagus nerve. However, the electrical impulses cannot pass directly from a nerve cell to the skeletal muscle cells to excite them. Numerous Nissl bodies were observed, indicating that the neurons had a high ability to synthesize proteins. Classify neurons according to their function. What is the role of calcium in synaptic activity? Which of the following is not a function of the autonomic nervous system? A) cell body a. decrease a neurons's aerobic energy metabolism. . c. olfactory information. d. that a person has autochromosomal traits. d. None of these are correct. b. hindbrain. a) motor fibers that conduct nerve impulses from the CNS to smooth muscle, cardiac muscle, and glands b) motor fibers that conduct nerve impulses from the CNS to skeletal muscles c) sensory and motor neurons t. 1. B) type of stimulus receptor b. Which nervous system subdivision is a chain of two motor neurons consisting of a preganglionic and a postganglionic neuron? What is a credit line? nerve impulses) Need constant supply of nutrients and oxygen O All of the listed answer choices . Because all action potentials are alike, how does the brain separate situations that require immediate attention from ordinary "positional" reports? Question. b. inhibit axon growth. b. dorsal horn A) peripheral and spinal nerves B) brain, spinal cord, and peripheral nerves C) brain and spinal cord D) spinal cord and spinal nerves. Which of the choices below describes the ANS? d. inferior colliculus. 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. A. ependymal cells B. Schwann cells C . A. excitability B. neurotransmitter production C. high energy needs D. capability of mitosis. Some axon terminals contain more than one kind of neurotransmitter. WHICH OF THE FOLLOWING IS TRUE REGARDING UMNS ? 80. 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 of the following is not characteristic of neurons? A) axon B) dendrite C) neurolemma DI) Schwann cell. The part of a neuron that sends neurotransmitters into a synapse is called a(n): 6. A) the impulse would move to the axon terminal only a. Oligodendrocytes D) size of action potentials, Bipolar neurons are commonly ________. B) A nerve impulse occurs if the excitatory and inhibitory effects are equal. b. medulla. A drug that caused someone to make a reckless decision might be affecting the: researcher would: What should the nurse explain to the patient regarding the role of serotonin and depression? Select all that apply. Cells may have long extensions. Why does a hyperpolarization phase generally follow a repolarization phase in an action potential? B) are found on "pathfinder" neurons a. Pons A. D) ATP and other purines c. Motor neurons. Which of the following is not a function of astrocytes? a. Functional genomics All rights reserved. D) all sodium gates are closed, In what way does the interior surface of a cell membrane of a resting (nonconducting) neuron differ from the external environment? a. Preganglionic neurons tend to be long, with the ganglion located in or near the effector target tissue(s). c. The person would later be unable to recall events that took place for some period of time after Current flows continuously, Local current flows a. regenerating axons may be unable to regain previous connections through the site of injury. 58. A) origin of the stimulus The characteristic neurologic picture including loss of consciousness, temporary respiratory arrest, and loss of reflexes. The greater the density of spines along dendrites, the greater a neuron's: 5. the sympathetic division of the autonomic nervous system. Which of the following is an EXCITATORY neurotransmitter secreted by motor neurons innervating skeletal. The autonomic has two divisions: the sympathetic and parasympathetic. C) They are mitotic. c. Ganglia The synaptic cleft prevents an impulse from being transmitted directly from one neuron to another. The oligodendrocytes can myelinate several axons, Cell bodies of sensory neurons may be located in ganglia lying outside the central nervous system, During depolarization, the inside of the neuron's membrane becomes less negative. Citation 17 - Citation 21 However, the effect of CH on axonal plasticity within the white matter following ischemic stroke is not known in detail. Which statement is true? C) neurolemma Polygenic inheritance is the inheritance of traits that are influenced by multiple genes. Which ion channel opens in response to a change in membrane potential and participates in the generation and conduction of action potentials? a) Myelinated axons transmit nerve impulses via continuous conduction. Neurons are found across the body but are most numerous in the brain. depression would be an example of: 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. 44. Which of the following statements regarding nervous tissue is not true? (a) They conduct impulses. A substance that directly activates gene transcription is likely acting as a: ce3z/(4zi)3dz_ce^{3z}/(4z-i)^3dz The characteristics that vary on a continuum among people, such as height, skin color, or intelligence, are most likely determined by polygenic inheritance. A. Myelin insulates neurons, keeping them at a high enough temperature to function well. c. sleepiness. Name two amino acid neurotransmitters, two catecholamines, and two peptides. In which area of the neuron is an action potential initially generated? 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. The sheath of Schwann is also called the ________. D) are crucial for the development of neural connections, An inhibitory postsynaptic potential (IPSP) is associated with ________. C) leakage channel The cells communicate by sending signals between different parts of the brain, and the neurons can interface with gray matter nuclei. 18. 1. Unipolar,Bipolar,Multipolar. True or False, Which of the following is not a function of astrocytes? b. (a . C. cell body. 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?