During the refractory period, another action potential cannot be generated. The neuron cannot respond to a second stimulus, no matter how strong. c) nerves Which of the following describes the nervous system integrative function? At a chemical synapse, both the presynaptic and postsynaptic areas of the cells are full of the molecular machinery that is involved in the transmission of nerve impulses. d) cells with gap junctions use chemical synapses, the synaptic cleft prevents an impulse from being transmitted directly from one neuron to another, Which of the following is true about the movement of ions across excitable living membranes? 33) A second nerve impulse cannot be generated until _____. The answer involves ions, which are electrically charged atoms or molecules. how many stomach compartments are in a ruminant animal?
Chapter 11 Flashcards | Quizlet 3.) Saltatory conduction is made possible by ________. a second nerve impulse cannot be generated until: Definition. Numerous nerve impulses arriving at a synapse at closely timed When information is delivered within the CNS simultaneously by different parts of the neural pathway, the process is called ________ processing. A nerve impulse, like a lightning strike, is an electrical phenomenon. property of being electrically coupled.
Nervous system - Action potential | Britannica This delay may be accounted for by three factors. (c) Find the minimum product of sums.
Chapter 11 Nervous System Flashcards - Easy Notecards 1.) Plasma membrane exhibits voltage-gated Na+ and K+ channels. B) analyzes sensory information, stores information, makes decisions. The term central nervous system refers to the ________. Once the membrane potential is completely returned to its resting potential (when membrane potential is reestablished), the neurons become ready for second or next nerve stimulus. a) mechanically gated channel What generally determines the effects of a neurotransmitter on a postsynaptic cell? As shown in Figure \(\PageIndex{5}\), the presynaptic area contains many tiny spherical vessels called synaptic vesicles that are packed with chemicals called neurotransmitters. Other neurons have the neuron cannot respond to a second stimulus, no matter how strong: absolute refractory period: . F(A,B,C,D)=BD+BCD+ABC+ABCD+BDF(A, B, C, D)=B D^{\prime}+B^{\prime} C D+A B C+A B C^{\prime} D+B^{\prime} D^{\prime}F(A,B,C,D)=BD+BCD+ABC+ABCD+BD (b) Find the minimum sum of products. Which of the following is not a function of astrocytes? C) control the chemical environment around neurons, D) guide the migration of young neurons, synapse formation, and
Chapter 11 Flashcards - Easy Notecards It means it doesnt conduct nerve impulses in this state. A) the membrane potential has been reestablished B) the Na ions have been pumped back into the cell C) proteins have been resynthesized D) all sodium gates are closed the membrane potential has been reestablished Immediately after an action potential has peaked, which cellular gates open? When a sensory neuron is excited by some form of energy, the resulting graded potential is called a(n) ________. This combined action of EPPs is called summation. It persists for only 2 milliseconds. The sheath of Schwann is also called the ________. c) stimulate the production of acetylcholine helping to determine capillary permeability, Which of the following is not a chemical class of neurotransmitters? postsynaptic neuron by many terminals at the same time.3.) central processes. In conducting nerve impulse, the following play a major role: Axon plays a major role in the process by transmitting signals in the form of nerve impulses via synapses to the target cells. Axon terminals release neurotransmitters.
Anatomy Test #3d Flashcards job of the oligodendrocyte. C) Spinal reflexes are an example of serial processing. This helps in maintaining the membrane potential and thus favors faster nerve impulses. Which of the following is a good example of a neuromodulator? Second, the response of the postsynaptic receptor takes about 0.15 millisecond. If a motor neuron in the body were stimulated by an electrode placed about midpoint along the length of the axon ________. This makes the process of nerve impulse faster as the nerve impulse does not travel the entire length of the axon ( this happens in case of continuous conduction). contraction would occur, D) the impulse would spread bidirectionally.
3.) Tecle, with a mass of 65.0 kg, is standing by the boards at the side of an ice skating rink. Plasma buffering potassium and recapturing neurotransmitters are Collections of nerve cell bodies outside the central nervous system are called ________. A second nerve impulse cannot be generated until ________. Nerve impulse propagates by jumping from one node of Ranvier to the next. Synaptic vesicles. During the resting state, the sodium-potassium pump maintains a difference in charge across the cell membrane of the neuron. A neuron that has as its primary function the job of connecting other neurons is called a(n) ________. Relative refractory period An exceptionally strong stimulus can trigger a response Repolarization The specific period during which potassium ions diffuse out of the neuron due to a change in membrane permeability. The B) open ion channels to provoke rapid responses. A) the myelin sheath The ions may attach to the membranes of synaptic vesicles, in some way facilitating their fusion with the nerve terminal membrane. Unipolar neurons have axons structurally divided into peripheral and b. Axon- Helps in the propagation of nerve impulses to the target cell. Why was the decision Roe v. Wade important for feminists? a second nerve impulse cannot be generated until: the membrane potential has been re-established: in what way does the interior surface of a cell membrane of a resting (nonconducting) neuron differ from the external enviroment? happen after a refractory period, when the membrane potential has A second nerve impulse cannot be generated until _____. a) afforestation neuron No problem. ________. Which of the following is not a function of the autonomic nervous system? This quantal release of neurotransmitter has a critical influence on the electrical potential created in the postsynaptic membrane. Which of the following correctly describes a graded potential? D) found in the retina of the eye, Which of the choices below describes the ANS? An excitatory postsynaptic potential is generated when. Because this infusion of positive charge brings the membrane potential toward the threshold at which the nerve impulse is generated, it is called an excitatory postsynaptic potential (EPSP). a) nuclei potential (EPSP) is being generated on the dendritic membrane?A) some types of Na+ channels inactivate at a positive potential and C) found in ganglia A single type of channel will open, permitting simultaneous flow of It is called the action potential because the positive charge then flows through the cytoplasm, activating sodium channels along the entire length of the nerve fibre. True or False, Chapter 11 Fundamentals of the Nervous System and Nervous Tissue (TB). diffusion of K+ out of the axon through gated ion channels. A second nerve impulse cannot be generated until ________. One mechanism, the sodium-potassium pump, maintains the resting potential, and another, the various ion channels, helps create the action potential. mimicked by morphine, heroin, and methadone?A) acetylcholine B) The EPP is actually made up of multiple MEPPs, which arise when an activated terminal releases hundreds of neurotransmitter quanta. True or False, In myelinated axons the voltage-regulated sodium channels are concentrated at the nodes of Ranvier. channels at the presynaptic end, which in turn promotes fusion of membrane exhibits chemically gated ion channels. Due to the high concentration of sodium ions inside the axoplasm, the potassium channels will open. Subthreshold Stimulus An insufficient stimulus Spatial Summation The inside of the membrane becomes negative again. Another factor is the temperature of the nerve fibre. An excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle is ________. Definition. Which of the following is not a structural feature of a neuron? The answer is 'the membrane potential has been reestablished' Ths occurs by pumping out sodium ions from the inside of the cell. In myelinated neurons, myelinated sheaths are present. The generation of a second action in some neurons can only happen after a refractory period, when the membrane potential has returned it's base level or even more . A) are crucial for the development of neural connections. This transmission of a nerve impulse across the neuron membrane as a result of a change in membrane potential is known as Nerve impulse conduction. These ions are propagated inside and outside the cell through specific sodium and potassium pumps present in the neuron membrane. Due to this, the transmission of nerve impulses is slower than electrical synapses. concentrated at the nodes of Ranvier. The channels often allow ions to diffuse in both directions, but some gated channels restrict transmission to only one direction. This period occurs at the end of action potential and limits the speed at which nerve impulses can be generated in a nerve fibre. You can specify conditions of storing and accessing cookies in your browser, A second nerve impulse cannot be generated until ________. c) ependymal cells An inhibitory postsynaptic potential (IPSP) is associated with ________. This page titled 11.4: Nerve Impulses is shared under a CK-12 license and was authored, remixed, and/or curated by Suzanne Wakim & Mandeep Grewal via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request. 4.) C) brain, spinal cord, and peripheral nerves, Which of the following neurotransmitters inhibits pain and is Select the correct statement regarding synapses. Until potassium channels close, the number of potassium ions that have moved across the membrane is enough to restore the initial polarized potential state. 4.) the biceps muscle. They are generated when the nerve The term central nervous system refers to the ________. A second nerve impulse cannot be generated until ________. analyzes sensory information, stores information, makes decisions. C) motor fibers that conduct nerve impulses from the CNS to smooth muscle, cardiac muscle, and glands. conduction velocity, Human Anatomy and Physiology, Books a la Carte Edition. b) sensory and motor neurons that supply the digestive tract It causes the movement of ions both against the concentration gradient. The neurons are said to be in resting phase when there is no nerve impulse. if the ventral nerve root of a spinal is never destroyed a person would lose.. . The period after an initial stimulus when a neuron is not sensitive to another stimulus is the ________. a.
Free Flashcards about Chapter 11 A&P - StudyStack Axon diameter and degree of myelination determine nerve impulse Schwann cells are functionally similar to ________. There the vesicles lose their coats, are probably refilled with neurotransmitter, and pinch off from the cisternae to become synaptic vesicles once more. Select the correct statement regarding synapses. What is the role of acetylcholinesterase? They may also be removed from the terminal by exchange with extracellular Na+a mechanism known to occur at some neuronal membranes. The interior is ________. are called ________. The action potential is a result of the movement of ions in and out of the cell. a second nerve impulse cannot be generated until___ the membrane potential has been reestablished: an impulse from one nerve cell is communicated to another nerve cell via the___ synapse: neuroglia that control the chemical enviroment around neurons by buffering potassium and recapturing neurotransmitters are___ astrocytes Which result of the stimulus applied is the likely cause of the We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739.
A second nerve impulse cannot be generated until - Brainly.com True or False, Neurons that are far away from the center of the neuron pool and that are not easily excited by an incoming stimulus are in the discharge zone. 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 The effect of a neurotransmitter on a postsynaptic cell depends mainly on the type of receptors that it activates, making it possible for a particular neurotransmitter to have different effects on various target cells. Nerve cell adhesion molecules (N-CAMs) ________. For this, sodium voltage-gated channels open. Neurotransmitter inactivation is carried out by a combination of three processes. A second nerve impulse cannot be generated until _____. the membrane potential has been reestablished In what way does the interior surface of a cell membrane of a resting (nonconducting) neuron differ from the external environment? A) proteins have been resynthesized B) all sodium gates are closed C) the Na ions have been pumped back into the cell D) the membrane potential has been reestablished Try it now. A neuronal circuit that concentrates or directs a large number of incoming impulses to a rather small number of neurons is called a(n) ________. Neurons may be classified according to several characteristics. True or False, Voltage is always measured between two points and may be called the potential between these two points. 0.80.80.8 liters The signal is transmitted in the form of ions and therefore it is much faster than chemical synapses. a) destroy ACh a brief period after its release by the axon endings Calcium ions. Mastering A&P Human Anatomy & Physiology 10th Edition Marieb. D) pumps three sodium ions outside the cell and two potassium ions inside. These electrochemical changes cause depolarization of the membrane resulting in the generation of nerve impulses. Which neuron is common only in dorsal root ganglia of the spinal He pushes off the boards with a force of 9.0 N. What is his resulting acceleration? Figure 11.4. sc.7.L.15.2. A) The synaptic cleft prevents an impulse from being transmitted directly from one neuron to another. A neuron that has as its primary function the job of connecting other neurons is called a(n) _____. The flow of which type of ion into the neuron results in an action potential? In contrast to electrical transmission, which takes place with almost no delay, chemical transmission exhibits synaptic delay. Collections of nerve cell bodies outside the central nervous system are called ________. Beginning at the resting potential of a neuron (for instance, 75 mV), a local potential can be of any grade up to the threshold potential (for instance, 58 mV). A Which of the following neurotransmitters inhibits pain and is mimicked by morphine, heroin, and methadone? c) voltage-gated channel The action potential will move down the axon toward the synapse like a wave would move along the surface of the water. Synaptic cleft. 2.) A series of EPPs, or a number of them stimulated simultaneously at many synapses, can then bring the cell to the threshold of the action potential. conduction states that the whole nerve cell must be stimulated for Temperature directly correlates with the transmission of nerve impulses. Nerve impulse propagates by jumping from one node of Ranvier to the next. The transmission of nerve impulses across chemical synapses is more complex. This method of transmitting nerve impulses, while far less common than chemical transmission, occurs in the nervous systems of invertebrates and lower vertebrates, as well as in the central nervous systems of some mammals. 16. True or False, Cell bodies of sensory neurons may be located in ganglia lying outside the central nervous system. There is space between the pre-synaptic neuron and post-synaptic neuron which is known as synaptic cleft or synaptic gap. c) glial cell
about midpoint along the length of the axon ________.A) the A) Voltage would be measured by placing one electrode inside the membrane and another outside the membrane. Which of the following will occur when an excitatory postsynaptic potential (EPSP) is being generated on the dendritic membrane? directly from one neuron to another. leakage gated channels c. 1.21.21.2 liters zoneD) Secretory regionE) Trigger zone. d) efferent neuron, What are ciliated CNS neuroglia that play an active role in moving the cerebrospinal fluid called? d) act as a transmitting agent, destroy ACh a brief period after its release by the axon endings, Which of the following is false or incorrect? Opening K+ or Cl- channels in a postsynaptic receptor detects a foreign stimuli. association neuron. This is close to the Nernst potential for Na+that is, the membrane potential at which electrochemical equilibrium would be established if the membrane were completely permeable to Na+. a single type of channel will open, permitting simultaneous flow of sodium and potassium. Join over 22,000 learners who have passed their exams thanks to us! Which of the following is not a special characteristic of neurons? Collections of nerve cell bodies outside the central nervous system This series of activations, by propagating the action potential along the fibre with virtually no reduction in amplitude, gives the nerve impulse its regenerative property.
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