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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Textbook Question
Chapter 14, Problem 8MC
Which type of neuronal pool uses nerve impulse feedback to repeatedly stimulate the circuit?
| a | Converging circuit |
| b. | Diverging circuit |
| c | Reverberating circuit |
| d | Parallel-after-discharge circuit |
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Sarah wants to call her new friend, Julie, and needs to write down her phone number but cannot find a pen. She continues to repeat the number over and over. This is most likely occurring in what type of neuronal pool? a. reverberating circuit b. divergent circuit c. convergent circuit d. parallel-after-discharge circuit
During the action potential, which of the following activity is LIKELY to occur?
Select one:
a. Na+ channels open at the beginning of the action potential, and Na+ moves into the axon
b. Na+ channel passages become smaller and get retracted at the beginning of the action potential
c. Na+ channels are less active and static throughout the action potential process
d. less Na+ is pumped to the axon when the action potential is triggered
Imagine a neuron receiving twice the number of inhibitory postsynpatic potentials as excitatory postsynpatic potentials. Calcium levels inside the axon terminus of this neuron would be
Select one:
a. Low
b. High
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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- Neurons contain ________, which can receive signals from other neurons. a. axons b. mitochondria c. dendrites d. Golgibodiesarrow_forwardThe nerve impulses always travel in one direction from dendrites to axon terminals. What prevents an action potential from travelling backward? a. Hyperpolarization of the neuron makes the membrane more positive and prevents another action potential. b. After repolarization, the refractory period occurs, where the sodium ions are found outside the cell. c. After repolarization, the reversal of ions prevents another action potential as there would not be enough sodium ions outside the cell to rush in. d. The refractory period prevents another action potential by lowering the threshold potential.arrow_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_forward
- The axon hillock of a neuron reaches the threshold of excitation and the membrane potential becomes completely reversed. Then, suddenly, the membrane potential begins to return to resting membrane potential. What is the event that triggers this return to resting potential? A. Na+ channels close in a voltage-dependent manner B. Na+ channels close in a time-dependent manner C. Na+ channels close in a chemically-dependent manner D. Na+ channels open in a voltage-dependent mannerarrow_forwardWhich of the following allows the cell to recover from hyperpolarization during an action potential? A. Stimulus gated sodium channels B. voltage gated sodium channels C. voltage gated potassium channels D. sodium/potassium pumparrow_forwardNeuron A is an inhibitory neuron that is activated when the person feels heat in the tip of their index finger. Neuron A sends signals to neuron B (the postsynaptic neuron). First consider how a stimulus impacts the firing rate of neuron A. For example, when the person touches ice with their index finger vs. when the person touches a hot cup of coffee with their index finger? How would each of these impact the frequency of action potentials, the size of action potentials and the amount of neurotransmitter released. Second, consider Drug-D that causes all sodium channels in neurons to close immediately. How would taking Drug-D affect the firing rate of neuron A when the person touches a hot pan? In turn, how would this affect the firing rate of post-synaptic neuron B? Rubric: Impact of heat on A Impact of ice on A ( Impact of drug X on A Impact of drug X on B 1arrow_forward
- 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 thresholdarrow_forwardWhere is the action potential generated initiated in the neuron? Select one: a. Nucleus of the neuron. b. Dendritic terminals. c. Post-synaptic gap. d. Axon hillock.arrow_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
- anatomy which one is the answer?arrow_forwardWhat ion enters a neuron causing depolarization of thecell membrane?a. sodiumb. chloridec. potassiumd. phosphatearrow_forwardTetrodotoxin is a poison that prevents voltage-gated channels from opening. Would this toxin prevent Graded Potentials and Action Potentials from occurring in an active nerve? Explain why or why not for both types of depolarizations.arrow_forward
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