Biology: Concepts and Investigations
5th Edition
ISBN: 9781260259049
Author: Hoefnagels
Publisher: MCG
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Textbook Question
Chapter 26.3, Problem 7MC
How do myelin and the nodes of Ranvier speed neural impulse transmission along an axon?
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How does myelin aid propagation of an action potential along an axon? How do the nodes of Ranvier help this process?
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Chapter 26 Solutions
Biology: Concepts and Investigations
Ch. 26.1 - Prob. 1MCCh. 26.1 - Prob. 2MCCh. 26.1 - Prob. 3MCCh. 26.2 - Prob. 1MCCh. 26.2 - Where is the myelin sheath located?Ch. 26.2 - Prob. 3MCCh. 26.2 - What are the functions of each of the three...Ch. 26.3 - Describe the forces that maintain the distribution...Ch. 26.3 - Prob. 2MCCh. 26.3 - Prob. 3MC
Ch. 26.3 - Prob. 4MCCh. 26.3 - What prevents action potentials from spreading in...Ch. 26.3 - Prob. 6MCCh. 26.3 - How do myelin and the nodes of Ranvier speed...Ch. 26.4 - Describe the structure of a synapse.Ch. 26.4 - Prob. 2MCCh. 26.4 - Prob. 3MCCh. 26.4 - Prob. 4MCCh. 26.5 - Prob. 1MCCh. 26.5 - Prob. 2MCCh. 26.5 - Prob. 3MCCh. 26.5 - Prob. 4MCCh. 26.6 - Prob. 1MCCh. 26.6 - Prob. 2MCCh. 26.6 - Prob. 3MCCh. 26.6 - List some structures that protect the central...Ch. 26.6 - Prob. 5MCCh. 26.7 - The researchers conducted a behavioral experiment...Ch. 26.7 - Prob. 2MCCh. 26 - Some cells of the central nervous system are...Ch. 26 - Prob. 2MCQCh. 26 - What event triggers an action potential? a....Ch. 26 - Prob. 4MCQCh. 26 - Prob. 5MCQCh. 26 - Prob. 6MCQCh. 26 - Prob. 7MCQCh. 26 - Damage to the surface tissue of the spinal cord...Ch. 26 - Prob. 9MCQCh. 26 - Describe some invertebrate nervous systems. Why do...Ch. 26 - Prob. 2WIOCh. 26 - Prob. 3WIOCh. 26 - Prob. 4WIOCh. 26 - What is the connection between the threshold...Ch. 26 - Write a nonbiological analogy for resting...Ch. 26 - Prob. 7WIOCh. 26 - Sketch a synapse: label the axon and synaptic...Ch. 26 - Describe the events that occur at a synapse when a...Ch. 26 - Prob. 10WIOCh. 26 - Prob. 11WIOCh. 26 - Cerebral palsy is a nervous system disorder that...Ch. 26 - Traumatic brain injury can occur when a person...Ch. 26 - Prob. 14WIOCh. 26 - Prob. 15WIOCh. 26 - Prob. 16WIOCh. 26 - Prob. 1PITCh. 26 - Prob. 2PITCh. 26 - PULL IT TOGETHER 4. Acid the somatic, autonomic,...
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- What happens at the nodes of Ranvier in a myelinated axon?arrow_forwardахon 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.arrow_forwardWhy are impulses transmitted more quickly down a myelinated axon than down an unmyelinated axon?arrow_forward
- What effect would you expect an antagonist that targets the voltage sensing domain of perisynaptic calcium channels of an inhibitory interneuron have on the firing frequency of a finically active neuron that interneuron synapses onto? Explain in detailsarrow_forwardSometimes diverging circuits split into excitatory and inhibitory paths. When might such a circuit be required?arrow_forwardWhy is saltatory conduction along a myelinated axon faster than continuous conduction along an unmyelinated axon?arrow_forward
- What is neural integration? How does a neuron “sort out” incoming EPSPs and IPSPs using the terms depolarization and hyperpolarization.arrow_forwardUsing the neurons below, how can you decrease the connection strength (amplitude of EPSP) onto the test cell below? You can only change the properties of the blue neuron. How could you change the properties of the blue neuron to increase the connection strength onto the test cell? What type of plasticity is this? Now, briefly explain how the properties of synaptic plasticity could result in “learned” behaviors such as stopping at a stop sign while driving.arrow_forwardDraw a chain of two neurons that synapse on one another in sequence. Label the presynaptic and postsynaptic ends of each neuron, the cell bodies, dendrites, axons, axon hillock and axon terminals, location of voltage gated Ca²+ channels, location of voltage gated Na+ channels, location of voltage gated K* channels, location of Na*/ K+ pumps, location of neurotransmitter storage, location of neurotransmitter receptors. Consider your drawing and describe the function of neurons. Include an explanation why neurons are considered polarized cells and how this relates to their function. (Polarized here is not referring to membrane potential as all cells have a membrane potential). This means you will need to explain the location of different channels in the neuron and the relationship of the channels to the function of a neuron.arrow_forward
- Provide a microscopic picture of a "typical neuron" that shows the soma, dendrites, axon, axon hillock, collateral axon, node of ranvier and presynaptic terminal.arrow_forwardWhich ions flow through chemically gated channels to produce IPSPs? EPSPs?arrow_forwardWhich of the following glial cells provide myelin in the central nervous system?arrow_forward
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