outside the central nervous system, Myelination of the nerve fibers in the central nervous system is the 2.) This process is called repolarization. True or False, Acetylcholine is not a biogenic amine. Select the correct statement about synapses. What event is depicted in the structure labeled A? This is essential for altering the resting membrane state to action membrane potential. b) ions always move passively across membranes Once the nerve impulse has been generated it. Collections of nerve cell bodies outside the central nervous system are called ________. to another stimulus is the ________.A) depolarization, Strong stimuli cause the amplitude of action potentials generated to increase. Conduction velocity increases at high temperatures and decreases at low temperatures. When the action potential is over (after transmitting the nerve impulse through neuron) the cell membrane potential returns back by repolarizing the membrane. After repolarization there is a period during which a second action potential cannot be initiated, no matter how large a stimulus current is applied to the neuron. What does the central nervous system use to determine the strength of a stimulus? Which of the following describes the nervous system integrative function? Which neuron would connect to a muscle? 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. Nerve impulse propagates by jumping from one node of Ranvier to the next. d) motor fibers that conduct nerve impulses from the CNS to skeletal muscles, motor fibers that conduct nerve impulses from the CNS to smooth muscle, cardiac muscle, and glands, Saltatory conduction is made possible by ________. 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? Hence, more time is taken in generating and then transmitting nerve impulses during an action potential. During the refractory period, another action potential cannot be generated. What major ion currents occur at the point along the action potential B) negatively charged and contains less sodium. A second nerve impulse cannot be generated until ____ the membrane potential has been reestablished Saltatory conduction is made possible by ________. The fastest conduction velocity occurs in the largest diameter nerve fibres. are called ________. Select the correct answer for the following question: 3.) c) stimulate the production of acetylcholine Which ion channel opens in response to a change in membrane potential and participates in generation and conduction of action potentials? Determine its coordinate direction angles of the force. 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? C) The synaptic cleft prevents an impulse from being transmitted The cell that sends the nerve impulse is called the presynaptic cell, and the cell that receives the nerve impulse is called the postsynaptic cell. the inferior is ____ negatively charged and contains less sodium 30 This is called sodium inactivation, and it is caused by gates within the channel that are sensitive to depolarization. Repolarization second nerve impulse cannot be generated until proteins have been resynthesized the na ions DismissTry Ask an Expert Ask an Expert Sign inRegister Sign inRegister Home The frequencies of the alleles A and a are 0.60.60.6 and 0.40.40.4, respectively, in a particular plant population. a single type of channel will open, permitting simultaneous flow of sodium and potassium. These differences in concentration create an electrical gradient across the cell membrane, called resting potential. C) found in ganglia Other neurotransmitters stimulate a net efflux of positive charge (usually in the form of K+ diffusing out of the cell), leaving the inside of the membrane more negative. c) action potential Which of the following is not characteristic of neurons? A third process, called mobilization of the transmitter, is traditionally postulated as taking up the remaining time, but evidence suggests that the time is occupied at least partially by the opening of calcium channels to allow the entry of Ca2+ into the presynaptic terminal. negatively charged and contains less sodium. Which of the following is a good example of a neuromodulator? Axon Ending- Acts as a transmitter of signals. C) They can be called postsynaptic potentials. 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+. Direct diffusion of ions through these junctions allows the action potential to be transmitted with little or no delay or distortion, in effect synchronizing the response of an entire group of neurons. Neurons are a complex network of fibers that transmit information from the axon ending of one neuron to the dendrite of another neuron. Why was the decision Roe v. Wade important for feminists? A) The release of neurotransmitter molecules gives cells the property of being electrically coupled. Select the correct statement regarding synapses. The process of transmission of a nerve impulse from one neuron to the other, after reaching the axons synaptic terminal, is known as synapses. Some synapses are purely electrical and make direct electrical connections between neurons. In this situation, sodium channels open and potassium channels are closed. 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 . Another factor is the temperature of the nerve fibre. Involved in activating fibers of a skeletal muscle such as A second nerve impulse cannot be generated until when? True or False, Chapter 11 Fundamentals of the Nervous System and Nervous Tissue (TB). During the refractory period, another action potential cannot be generated. These sites have the advantage of being readily accessible for recording by electrodesespecially the squid synapse, which is large enough that electrodes can be inserted directly into the presynaptic terminal and postsynaptic fibre. D) Cells with gap junctions use chemical synapses C. 11 C) The synaptic cleft prevents an impulse from being transmitted directly from one neuron to another. When a neuron is not actively transmitting a nerve impulse, it is in a resting state, ready to transmit a nerve impulse. A neuron that has as its primary function the job of connecting other neurons is called a(n) ________. You can specify conditions of storing and accessing cookies in your browser, A second nerve impulse cannot be generated until ________. A second nerve impulse cannot be generated until ________. A gap between Schwann cells in the peripheral system is called a(n) ________. Study now. returned it's base level or even more negative. Collections of nerve cell bodies outside the central nervous system are called ________. { "11.1:_Case_Study:__The_Control_Center_of_Your_Body" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.
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