Modified Mastering A&P with Pearson eText -- Standalone Access Card -- for Anatomy & Physiology (6th Edition)
6th Edition
ISBN: 9780134388083
Author: Marieb
Publisher: PEARSON
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Chapter 11.3, Problem 8CYU
MAKING CONNECTIONS Which part of the neuron is its fiber? How do nerve fibers differ from the fibers of connective tissue (see the chapter Tissue: The Living Fabric Chapter 4) and the fibers in muscle (see the chapter Muscles and Muscle Tissue Chapter 9)?
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Chapter 11 Solutions
Modified Mastering A&P with Pearson eText -- Standalone Access Card -- for Anatomy & Physiology (6th Edition)
Ch. 11.1 - What is meant by integration, and does it...Ch. 11.1 - Which subdivision of the PNS is involved in (a)...Ch. 11.2 - Which type of neuroglia controls the extracellular...Ch. 11.2 - Which two types of neuroglia form insulating...Ch. 11.3 - How does a nucleus within the brain differ from a...Ch. 11.3 - How is a myelin sheath formed in the CNS, and what...Ch. 11.3 - Which structural and functional type of neuron is...Ch. 11.3 - MAKING CONNECTIONS Which part of the neuron is its...Ch. 11.4 - For an open channel, what factors determine in...Ch. 11.4 - Prob. 10CYU
Ch. 11.5 - What determines the size of a graded potential?Ch. 11.6 - Which is bigger, a graded potential or an action...Ch. 11.6 - An action potential does not get smaller as it...Ch. 11.6 - Why does a myelinated axon conduct action...Ch. 11.6 - If an axon receives two stimuli close together in...Ch. 11.7 - Events at a chemical synapse usually involve...Ch. 11.7 - What structure joins two neurons at an electrical...Ch. 11.8 - Which ions flow through chemically gated channels...Ch. 11.8 - Prob. 19CYUCh. 11.9 - Prob. 20CYUCh. 11.9 - Why is cyclic AMP called a second messenger?Ch. 11.10 - Which types of neural circuits would give a...Ch. 11.10 - Prob. 23CYUCh. 11.10 - What pattern of neural processing occurs when we...Ch. 11 - Which of the following structures is not part of...Ch. 11 - Match the names of the supporting cells found in...Ch. 11 - Assume that an EPSP is being generated on the...Ch. 11 - Prob. 3MCCh. 11 - The velocity of nerve impulse conduction is...Ch. 11 - Chemical synapses are characterized by all of the...Ch. 11 - Biogenic amine neurotransmitters include all but...Ch. 11 - Prob. 8MCCh. 11 - Inhibition of acetylcholinesterase by poisoning...Ch. 11 - The anatomical region of a multipolar neuron where...Ch. 11 - An IPSP is inhibitory because (a) it...Ch. 11 - Identify the neuronal circuits described by...Ch. 11 - Explain both the anatomical and functional...Ch. 11 - (a) Describe the composition and function of the...Ch. 11 - (a) What is myelin? (b) How does the myelination...Ch. 11 - (a) Contrast unipolar, bipolar, and multipolar...Ch. 11 - What is the polarized membrane state? How is it...Ch. 11 - Describe the events that must occur to generate an...Ch. 11 - Prob. 19SAQCh. 11 - (a) Explain the difference between an EPSP and an...Ch. 11 - Since at any moment a neuron is likely to have...Ch. 11 - The effects of neurotransmitter binding are very...Ch. 11 - Prob. 23SAQCh. 11 - Prob. 24SAQCh. 11 - Elaine Sawyer, 35, was on her way to the local...Ch. 11 - Elaine Sawyer, 35, was on her way to the local...Ch. 11 - Elaine Sawyer, 35, was on her way to the local...Ch. 11 - Elaine Sawyer, 35, was on her way to the local...Ch. 11 - Elaine Sawyer, 35, was on her way to the local...
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- Depolarisation & repolarisation in metaneuron - put the following events in order (from 1 to 4). Membrane potential crosses the threshold potential and an action potential is achieved. Depolarisation occurs when the applied current is sufficient to move membrane potential towards neutral. The neuron’s membrane potential drops below the initial resting membrane potential and temporarily becomes refractory to further action potentials. Membrane quickly repolarises by opening of K+ channels, allowing K+ions to leave the cell and charge separation to be re-established.arrow_forwardTest Your Understanding Know and Comprehend 3. Which of the following occurs first when voltage reaches the threshold level in a neuron plasma membrane? (a) voltageactivated Na+ channels open (b) K+ channels open (c) the membrane hyperpolarizes (d) neurotransmitter is released (e) K+ channels closearrow_forwardIntro to Neuroscience Question Explain your reasoning and why you chose that answer.: Which of the following does NOT accurately describe medium spiny neurons (MSNs)? Group of answer choices They make a small number of synapses with many GPNs and a large number of synapses with a few GPNs They are GABAergic and therefore inhibitory. They are constitutively active to tonically inhibit the thalamus. They are activated by inputs from the cortex. All of the above are truearrow_forward
- 12. An EPSP causes (depolarization/repolarization/hyperpolarization). These occur most often on what part of the neuron?___________________________________; ___________________________________.13, An IPSP causes (depolarization/repolarization/hyperpolarization). These occur most often on what part of the neuron?___________________________________; ___________________________________.14. Where on the neuron does integration occur (approximately)?___________________________________.arrow_forwardWatch this video (http://openstaxcollege.org/l/summation) to learn about summation. The process of converting electrical signals to chemical signals and back requires subtle changes that can result in transient increases or decreases in membrane voltage. To cause a lasting change in the target cell, multiple signals are usually added together, or summated. Does spatial summation have to happen all at once, or can the separate signals arrive on the postsynaptic neuron at slightly different times? Explain your answer.arrow_forwardQuestion:- An event such as cardiac arrest, which produces global ischemia of the brain, can result in a selective loss of recent memory and cognitive skills, while the more vegetative and life-sustaining functions such as breathing are preserved.A. Use principles related to the development of the nervous system and hierarchy of control to explain why.arrow_forward
- Quick question on the process of movement Multiple sclerosis is a disease in which the peripheral neurons lose their myelin sheath. In this disease, voluntary movement of the limbs is slowed because; Pick the ones that are true the rate of opening of ligand-gated Na+ channels is decreased. the generation of the action potential is blocked at points along the unmyelinated region due to the absence of voltage-gated channels the action potential amplitude is degraded at the Nodes of Ranvier of the peripheral neuron. The Schwann cells are targeted and destroyed by the immune system, affecting saltatory propagation. the rate of opening of ligand-gated Na+ channels is decreased.arrow_forwardGraph of membrane potential versus time The graph above represent time in milliseconds. At what time (in milliseconds) is the inside of the neuron the most positive and why? Explain why the membrane potential changes at X. Explain what is happening at point C to the sodium and potassium ions and how this is affecting the membrane potential. Describe two things that contribute to the resting membrane potential.arrow_forward3. Fluorescent FM dyes partition reversibly into biological membranes withoutpenetrating through them. Suppose that you have neurons cultured in a dish. Youincubate the neurons with an FM dye, and then you wash them with medium toremove the dye.a) You find that if the neurons are stimulated to trigger action potentials duringincubation with the dye, the synaptic regions of the neurons remain fluorescentafter the wash. Propose an explanation for this effect.b) After generating fluorescent synaptic regions by this procedure, suppose that youtrigger additional action potentials while continuing to wash with medium. Wouldyou expect the synaptic regions to lose fluorescence? Explain.arrow_forward
- Which part of a neuron contains the nucleus? dendrite soma axon synaptic end bulbarrow_forwardThe part of a neuron that contains the nucleus is the cell body dendrite axon glialarrow_forwardSynaptic delay :-a- is the time needed for release of neurotransmitter from synaptic vesiclesb- the minimal delay time in the central nervous system is about 0.5 millisecondc- is determined by the type of the neurotransmitterd- is determined by the number of postsynaptic receptorsarrow_forward
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