Which of the following statements is most correct about the speed of neural transmission? Myelinated axons have faster impulse transmission because the gated ion channels are more spaced out Myelinated axons have faster impulse transmission because the myelin sheath stores ATP Myelinated axons have faster impulse transmission because the axon covers a shorter distance Myelinated axons have faster impulse transmission because lipids provide energy Myelinated axons have slower impulse transmission because the lipid insulation slows down the action potential Myelinated axons have slower impulse transmission because the myelin adds resistance to the flow Myelinated axons have slower impulse transmission because the myelin is attracted to the sodium ions

Which of the following statements is most correct about the speed of neural transmission? Myelinated axons have faster impulse transmission because the gated ion channels are more spaced out Myelinated axons have faster impulse transmission because the myelin sheath stores ATP Myelinated axons have faster impulse transmission because the axon covers a shorter distance Myelinated axons have faster impulse transmission because lipids provide energy Myelinated axons have slower impulse transmission because the lipid insulation slows down the action potential Myelinated axons have slower impulse transmission because the myelin adds resistance to the flow Myelinated axons have slower impulse transmission because the myelin is attracted to the sodium ions

Anatomy & Physiology

1st Edition

ISBN:9781938168130

Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble

Publisher:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble

Chapter12: The Nervous System And Nervous Tissue

Section: Chapter Questions

Problem 4ILQ: View the University of Michigan Webscope (http://openstaxcollege.org/l/nervefiber) to see an...

See similar textbooks

Similar questions

The giant axon of the squid (Figure Q11–3) occu-pies a unique position in the history of our understandingof cell membrane potentials and nerve action. When anelectrode is stuck into an intact giant axon, the membranepotential registers –70 mV. When the axon, suspended in abath of seawater, is stimulated to conduct a nerve impulse,the membrane potential changes transiently from –70 mVto +40 mV.
The conduction velocity in nerves is primarily dependent on the O localization of the Na+ / K+ pumps intensity and duration of the stimulus myelination and fiber diameter O fiber length and myelination O fiber length and fiber diameter
Once an EPSP is produced in a dendrite, how does it stimulate the production of an action potential atthe axon hillock? What might prevent an EPSP from stimulating action potentials? How can anEPSP’s ability to stimulate action potentials be enhanced?
Excitatory neurons A and B both synapse with neuron C. Neuron A releasesa neurotransmitter, and neuron B releases the same type and amount ofneurotransmitter plus a neuromodulator that produces EPSPs in neuron C.Action potentials produced in neuron A alone can result in action potentialproduction in neuron C. Action potentials produced in neuron B alone alsocan cause action potential production in neuron C. Which results in moreaction potentials in neuron C, stimulation by only neuron A or stimulationby only neuron B? Explain.
ахon transmits information away from the cell body (centrifugal) and that ends by the terminal arborization. Only axons are surrounded by a myelin sheath. to the cell body (centripetal) and the axon that PROBI NG Ithe ACTIVITY What are the structural constituents of the gray matter, the white matter, and the nerve? Draw a neuron then use the different documents of the activity to determine, on the figure, t location of each part of the neuron in the nervous system. Using docs a, b, and c, draw and label a transverse section of the spinal cord, a cell body, a transverse section of a nerve.
Myelination beginning Аxon Internode Oligodendrocytes Neurolemma The myelin sheath and The myelin sheath in the CNS Nodes Мyelin Schwann cell| of Ranvier myelination in the PNS (b)
What is an example of asituation in which the neuroncell body is located in a part ofthe body and its axonalterminal portion is in anotherdistant part of the body? Whydoes this happen?
Absolute refractory periods in axons: Result from conformational changes in voltage gated K channels after opening O Result from Cl channel induced hyperpolarization O Result from Ca dependent phosphorylation of K channels Result from conformation changes in voltage gated Na channels after opening O Result from Ca dependent phosphorylation of Na channels
Axon can't branch Afferent neurons are generally bipolar neurons Most neurotransmitters are synthesized in the cytosol of a neuron GABA is the most common inhibitory neurotransmitter in the central nervous system Tendons are regular dense connective tissue that connect muscles to bone
A nerve impulse travels faster in small myelinated fibers large myelinated fibers large unmyelinated fibers small unmyelinated fibers SOOO
Wng Why do elinated asons Conduct action potentials Faster than asons P unmyelinated
Which of the following statements best describes the properties of a myelinated axons? The axon has an even distribution of ion channels but it is covered by layers of myelin apart from short sections termed the nodes of Ranvier where there is no myelin. The action potential is able to jump from node to node because the myelin sheath increases the length constant. There are very few ion channels underneath the myelin. The density of Na+ channels at the nodes of Ranvier is very high but there are no K+ channels in myelinated axons. The myelin sheath increases the rate of action potential conduction because the action potential underneath the myelin sheath travels faster than an action potential in an unmyelinated axon.