LooseLeaf for Human Anatomy
5th Edition
ISBN: 9781259285271
Author: Michael McKinley Dr., Valerie O'Loughlin, Elizabeth Pennefather-O'Brien
Publisher: McGraw-Hill Education
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Chapter 14, Problem 9MC
Summary Introduction
Introduction:
Axons terminate because they contact other neurons, muscle cells, or gland cells at specialized junctions called synapses. Synapse is a site where the nerve impulse is transmitted to the other cell.
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At an electrical synapse, presynaptic and postsynapticmembranes interface througha. neurofibril nodes.b. gap junctions.c. terminal arborizations.d. neurotransmitters.
At an electrical synapse, presynaptic and postsynaptic membranes interface through a. neurofibril nodes. b. gap junctions. c. telodendria. d. neurotransmitters.
Post synaptic neurons membrane potentials are less negative than resting membrane potentials when this occur
A. Creates a new set point for the resting membrane potential
B. Has a lower propensity to produce an action potential
C. Reacts by generating action potential
D. Higher chance of reaching the potential threshold
Chapter 14 Solutions
LooseLeaf for Human Anatomy
Ch. 14 - Together, what three functions do the CNS and PNS...Ch. 14 - Compare and contrast the meanings of afferent and...Ch. 14 - How do dendrites and axons differ in terms of...Ch. 14 - Prob. 4WYLCh. 14 - Prob. 5WYLCh. 14 - Prob. 6WYLCh. 14 - Prob. 7WYLCh. 14 - Prob. 8WYLCh. 14 - Prob. 9WYLCh. 14 - Prob. 10WYL
Ch. 14 - Prob. 11WYLCh. 14 - Prob. 12WYLCh. 14 - Prob. 13WYLCh. 14 - How is a diverging circuit different from a...Ch. 14 - Prob. 1MCh. 14 - Prob. 1MCCh. 14 - Neurons that have only two processes attached to...Ch. 14 - Prob. 3MCCh. 14 - Prob. 4MCCh. 14 - Prob. 5MCCh. 14 - Prob. 6MCCh. 14 - a. Neurolemmocyte b. Astrocyte c. Neuron d....Ch. 14 - Which type of neuronal pool uses nerve impulse...Ch. 14 - Prob. 9MCCh. 14 - Prob. 10MCCh. 14 - What are the three structural types of neurons?...Ch. 14 - Prob. 2CRCh. 14 - Prob. 3CRCh. 14 - Prob. 4CRCh. 14 - Prob. 5CRCh. 14 - Describe the arrangement and structure of the...Ch. 14 - Prob. 7CRCh. 14 - What are the differences between electrical and...Ch. 14 - Discuss the similarities and differences between...Ch. 14 - What are the basic developmental events that occur...Ch. 14 - Prob. 1DCRCh. 14 - Prob. 2DCR
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- Match the description with the statement that best describes the following regions synaptic knob axon hillock dendrites axon A. elongated projection that conducts electrical signals over long distances B. receives input from other neurons C. region of high denisty of voltage-gated channels, known as the trigger zone D. contains numerous vesicles containing neurotransmitterarrow_forwardDuring a relative refractory period of an action potential A. Another action potential can be fired, it just takes a greater stimulus for the membrane potential to reach threshold B. Na+ channels are either already open or are inactivated therefore the membrane absolutely can not produce another action potential, no matter how intense the stimulus C. Ca++ flows out of the cell, causing hyperpolarization and a need for a greater stimulus to generate the action potential D. The presynaptic neuron "tells" the postsynaptic neuron about the "relative" strength of signal E. None of the above are correctarrow_forwardMatch the description with the statement that best describes the following neural circuits. a single post-synaptic neuron receives input from multiple pre- synaptic neurons causes the stimulation of the post-synaptic neuron continually similar to a positive feedback response A. diverging circuits B. converging circuits C. reverberating circuits causes a longer lasting stimulus of the post-synaptic neuron D. parallel after discharge circuits a single pre-synaptic neuron synapses with multiple post-synaptic neurons Moving to another question will save this response. Photos A39 DEC 3 17 étvarrow_forward
- An inhibitory post synaptic potential is a membrane potential that: A. Is slightly depoloarized from resting membrane potential B. Is slightly hyperpolarized from resting membrane potential C. Is graded potential D. Both B & Carrow_forwardA synapse consists of: a. a synaptic knob b. neuron cell body c. plasma membrane of post synaptic neuron d. a synaptic knob, synaptic cleft, and plasma membrane of post synaptic neuronarrow_forwardAny change in a neuron's membrane potential that moves the membrane potential to a value more negative than the resting potential (e.g. -120mv) is: a. Hypopolarization b. Depolarization c. An action potential d. HyperpolarizationNOTE: A IS INCORRECTarrow_forward
- Which of the following is not a structural component of a chemical synapse? A. Presynaptic Knob B. Synaptic Cleft C. Postsynaptic Membrane D. All of the above.arrow_forwardWhich of the following examples of synaptic integration is most likelyto lead to an action potential in a postsynaptic cell?a. All excitatory and no inhibitory synaptic inputsb. An equal mix of excitatory and inhibitory inputsc. A majority of inhibitory inputs with only a few excitatory inputsd. Both a and b are correct.arrow_forwardIf a post synaptic neuron is stimulated to threshold by spatial summation this implies that Select one: a. the post synaptic cell has many voltage gated ion channels b. the post synaptic cell has a lower than normal threshold c. the post synaptic cell is slow to repolarize d. the post synaptic cell is synapsing with multiple presynaptic neuronsarrow_forward
- Postsynaptic potential’s are graded potential’s that develop in the postsynaptic membrane. If the release of a neurotransmitter at a post synaptic membrane leads to hyper polarization, this event is referred to as A. EPSP B. ISIP C. Summation D. Facilitationarrow_forwardIf a post synaptic neuron is stimulated to threshold by spatial summation this implies that Select one: a. the post synaptic cell has many voltage gated ion channels b. the post synaptic cell has a lower than normal threshold OC. the post synaptic cell is slow to repolarize d. the post synaptic cell is synapsing with multiple presynaptic neuronsarrow_forwardPostsynaptic potential’s are graded potential’s that develop in the postsynaptic membrane. If the release of a neurotransmitter at a post synaptic membrane leads to hyper polarization, this event is referred to as A. EPSP B. ISIP C. Summation D. Facilitation An individual EPSP usually only produces a slight depolarization of the postsynaptic membrane. If multiple stimuli arrive in rapid succession at a single synapse, this can lead to the generation of an action potential. This mode of generating action potentials is referred to as A. Spatial summation B. Facilitation c. Temporal summation D. Inhibition arrow_forward
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