• Why Do We Do This?
    buffering potassium and recapturing neurotransmitters are ________. A) microglia B) oligodendrocytes C) Schwann cells D) astrocytes 2 17) 18) Saltatory conduction is made possible by ________. A) erratic transmission of nerve impulses C) diphasic impulses 18) B) the myelin sheath D...
    Premium 830 Words 4 Pages
  • Nervous System Basics
    membrane potential that must be reached to produce an action potential * Action potential – the brief electrical impulse that provides the basis for conduction of info along an axon * K+ has a voltage dependent ion channel, too. * K+ ≈ -10 * AP is a brief rapid reversal of...
    Premium 1759 Words 8 Pages
  • Action Potential of a Neuron
    returns to its normal RMP. In a myelinated axon, the impulse is conducted as previously mentioned, except that it only happens at the node locations. The impulse travels from node to node and does so in a leaping fashion. This action was given the name of saltatory conduction after the Latin word...
    Premium 1482 Words 6 Pages
  • Nervous Control
    transmitting the information http://www.youtube.com/watch?v=3W0kMx2XStQ&feature=related Part I Climax Activity: self-assessment http://www.lrn.org/Content/Quizzes/Qnervous.html Part II 4. The Generation and transmission of nerve impulse (refer to lecture notes Pg14-27) 5.4 Resting...
    Premium 962 Words 4 Pages
  • Physiology Notes, Cell Structure and Metabolism
    travel Triggers a new, identical potential along membrane Self-perpetuating cycle of action potentials Saltatory conductionconduction in myelinated fibers Impulse “jumps” over sections of fibers covered with myelin to areas not covered Faster than contiguous Refractory Period Absolute Na...
    Premium 3704 Words 15 Pages
  • Simple Neuro Study Guide
    the cell to balance the change in charge. 3. Review the sodium-potassium pump SALTATORY CONDUCTION 1. Rapid conduction via myelin. 2. Review mechanism of conduction and purpose. SYNAPSES 1. Presynaptic Neuron-releases neurotransmitters into the synapse 2. Postsynaptic Neuron-contains...
    Premium 374 Words 2 Pages
  • Ohm's Law
    , membrane coated with myelin will not conduct an impulse. So, in a myelinated neuron, action potentials only occur along the nodes and, therefore, impulses 'jump' over the areas of myelin - going from node to node in a process called saltatory conduction (with the word saltatory meaning 'jumping...
    Premium 2978 Words 12 Pages
  • Nerve Conduction Velocity
    channels are located. There are no voltage-gated channels under the myelin so no action potential occurs there. This “skipping” of the myelinated area is the reason for the fast travel of the nerve impulse. This mode of travel by the action potential is called saltatory conduction. These...
    Premium 1451 Words 6 Pages
  • A&P II Nervous Tissue
    a supra threshold level! - Other Factors ! • All or None Principle : if stimulus generates an action potential, impulse is conducted through entire neuron ! - At the same rate regardless of stimulus strength ! • Saltatory Conduction : occurs in myelinated fibers; action potential leaps...
    Premium 2627 Words 11 Pages
  • Introduction to Neurology
    enables the current to travel longer distances. Continuous and saltatory conduction In between Schwann cells get small gaps called ‘nodes of Ranvier’ In myelinated axons (mainly larger) neurons the nerve impulses ‘jump’ between these nodes – salutatory conduction. Speed of...
    Premium 846 Words 4 Pages
  • Twitch Muscle Fibers
    ) occur between adjacent axon segments of the Schwann cell. 14. The type of nerve conduction in which and impulse jumps from node to node is called saltatory conduction. 15.) The greater the diameter of a nerve fiber, the faster the impulse travels. 16.) Explain in detail what physiological events...
    Premium 2237 Words 9 Pages
  • Nervous system
    neuron and more potassium is on the inside Unmyelinated fibers conduct impulses from one node of Ranvier to the next, a phenomenon called saltatory conduction Saltatory conductin- many times faster than conduction of unmyelinated neurons If nerve fiber responds at all to a stimulus, it responds...
    Premium 1025 Words 5 Pages
  • Nervous System
    fiber, the higher rate of conducting impulses. There is less electrical resistance in thick fibers. When nerve impulse jumps from one node (gaps in nerve fibers) to the next, it is called saltatory conduction. Saltatory conduction conducts faster because it contains an insulator that prevents...
    Premium 2102 Words 9 Pages
  • Physiology Exam 4
    . Describe saltatory conduction Saltatory Conduction- Transmission of an action potential along a myelinated fiber in which the nerve impulse appears to leap from node to node. APs are triggered only at he nodes. Describe how a chemical synapse works Chemical Synapse- Specialized for release and...
    Premium 1346 Words 6 Pages
  • Myelinating Schwann Cells
    axonal membranes at the nodes, action potentials cannot be generated. Instead, the current generated in the rising phase of a node travels to the next node in a “leaping” fashion. This process is known as saltatory conduction. Saltatory conduction is much more efficient than simple conduction since the...
    Premium 2066 Words 9 Pages
  • Propagation of Ap
    10/22/2012 Communication Along and Between Neurons (Ch.6) • Receptors receive stimuli, and convert them to nerve impulses • Alternating graded and all-or-none signals on the membrane of a single neuron • Graded potentials decay with distance (electrotonic conduction); longdistance...
    Premium 939 Words 4 Pages
  • Scin132 Midterm
    .  Question 36 of 60 1.67/ 1.667 Points  Saltatory conduction refers to the conduction of impulses in    A. all axons.       B. myelinated fibers.       C. cardiac muscle.       D. unmyelinated fibers.       E. skeletal muscle.   Answer Key: B Feedback: Good job!  Question 37 of 60 1.67...
    Premium 2535 Words 11 Pages
  • Physiology
     saltatory  conduction  to  conduct  nerve  impulses  along  the  axon.   A10.  ECF  is  contained  into  two  compartments  known  as  the  interstitial  fluid  and  the  blood  plasma.   B11.  The  semicircular...
    Premium 2932 Words 12 Pages
  • Anatomy
    of cell becomes more negative 16 absolute refractory period- another AP cannot be generated. Relative refractory period- a stronger threshold stimulus is needed to generate. 18. Saltatory conduction- myelinated fibers and conducts fast. Continuous conduction- non myelinated conducts slow 19...
    Premium 312 Words 2 Pages
  • Biology Nervous System
    (gray) Saltatory Conductionimpulse jumps from one node of Ranvier to the next Threshold – minimum level of sensitivity that a nerve cell has; based on the strength of the stimulus to start the impulse The stronger the stimulus, the more impulses are transmitted per second in more...
    Premium 1004 Words 5 Pages