Human Anatomy & Physiology (2nd Edition)
2nd Edition
ISBN: 9780134553511
Author: Erin C. Amerman
Publisher: PEARSON
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Textbook Question
Chapter 11.4, Problem 1QC
What are three locations where presynaptic axons connect with a postsynaptic neuron?
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what is postsynaptic neuron?
Which of the following is the role of axonal Calcium (Ca2+) channels in neuronal communication at the synapse?
a) they inhibit the action potential causing it to stop
b) Calcium channels have no role in this process
c) by allowing calcium to exit the cell, they promote the propagation of action potential across the synapse by creating depolarization
d) by blocking calcium entrance, they mediate the contraction of presynaptic axon to facilitate movement
e) when they open, calcium enters the presynaptic terminal, promoting fusion of neurotransmitter vesicles with presynaptic membrane, and release of neurotransmitters to the synaptic cleft
Which functional segment of a neuron contains chemically gated channels? Which functional segments contain voltage-gated channels?
Chapter 11 Solutions
Human Anatomy & Physiology (2nd Edition)
Ch. 11.1 - What are the organs of the CNS?Ch. 11.1 - Prob. 2QCCh. 11.1 - Describe the sensory, integrative, and motor...Ch. 11.1 - 4. What are the differences between the somatic...Ch. 11.1 - How does the somatic motor division of the PNS...Ch. 11.2 - What are the functions of the cell body,...Ch. 11.2 - What are the structural differences between...Ch. 11.2 - What are the functional differences between...Ch. 11.2 - What are the functions of astrocytes?Ch. 11.2 - Prob. 5QC
Ch. 11.2 - Prob. 6QCCh. 11.2 - 7. What is the function of the myelin sheath?
Ch. 11.2 - How does the myelin sheath differ in the CNS and...Ch. 11.2 - Are neurons more likely to regenerate in the CNS...Ch. 11.2 - Prob. 10QCCh. 11.3 - 1. What is the resting membrane potential?
Ch. 11.3 - In and around the axon, where is the higher...Ch. 11.3 - Prob. 3QCCh. 11.3 - 4. Define local potential. Why is it also called...Ch. 11.3 - Why are local potentials useful only for...Ch. 11.3 - What takes place during the depolarization phase...Ch. 11.3 - 7. What must be reached in order for...Ch. 11.3 - 8. What takes place during the repolarization and...Ch. 11.3 - 9. What are the absolute and relative refractory...Ch. 11.3 - 10. How do local potentials and action potentials...Ch. 11.3 - Which is useful for long-distance signaling, and...Ch. 11.3 - 12. How is an action potential propagated down an...Ch. 11.3 - Prob. 13QCCh. 11.4 - What are three locations where presynaptic axons...Ch. 11.4 - Define synaptic transmission.Ch. 11.4 - Prob. 3QCCh. 11.4 - How do the two types of postsynaptic potentials...Ch. 11.4 - Prob. 5QCCh. 11.4 - Prob. 6QCCh. 11.5 - Prob. 1QCCh. 11.5 - Prob. 2QCCh. 11.5 - Prob. 3QCCh. 11.5 - Prob. 4QCCh. 11.5 - Prob. 5QCCh. 11.5 - Prob. 6QCCh. 11.6 - 1. Why are neurons organized into neuronal...Ch. 11.6 - Prob. 2QCCh. 11.6 - 3. What mechanisms stabilize neural circuits?
Ch. 11 - Which of the following statements about the...Ch. 11 - 2. Regulation of heart rate, blood pressure, and...Ch. 11 - Match each type of neuroglial cell with its...Ch. 11 - 4. Mark the following statements as true or false....Ch. 11 - 5. An axon is best defined as a process that:
a....Ch. 11 - 6. Fill in the blanks: The myelinated segment of...Ch. 11 - 7. Fill in the blanks: The _______is the period of...Ch. 11 - 8. Which of the following statements best...Ch. 11 - 9. Identify the following as properties of...Ch. 11 - The trigger for exocytosis of synaptic vesicles...Ch. 11 - Match the following neurotransmitters with their...Ch. 11 - 12. Which of the following is not a method by...Ch. 11 - 13. A ________is characterized by multiple input...Ch. 11 - Mark the following statements as true or false. If...Ch. 11 - Sequence the following list of events of a...Ch. 11 - 16. Mark the following statements as true or...Ch. 11 - 1. A drug that blocks channels in neurons does so...Ch. 11 - Prob. 2CYUCh. 11 - Why must a cell body be intact for an axon to...Ch. 11 - 4. Explain how an action potential is propagated...Ch. 11 - Prob. 1AYKACh. 11 - 2. During a surgical procedure, an...Ch. 11 - Albert accidentally ingests the poison...Ch. 11 - 4. Albert, the patient in question 3, takes the...Ch. 11 - Predict the effect that tetrodotoxin would have on...Ch. 11 - Explain what would happen if depolarization of the...
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- What is the typical resting membrane potential of a neuron?arrow_forwardIn the central nervous system there may be many synaptic inputs on a postsynaptic neurons. How does the postsynaptic neuron respond to the many presynaptic inputs?arrow_forwardInhibitory postsynaptic potentials cause what type of change at the post-synaptic membrane?arrow_forward
- When an impulse arrives at the synapse, the synaptic vesicles open and release neurotransmitters into the cleft within a thousandth of a second. Within another ten thousandth of a second, these molecules have diffused across the cleft and bound to receptor sites in the effector cell. In what two ways is transmission across a synapse terminated so that the neuron’s signal is concluded?arrow_forwardWhat are the functional advantages and disadvantages of electrical synapses?arrow_forwardWhat is the difference between an excitatory postsynaptic potential and an inhibitory postsynaptic potential ? How does it effect the postsynaptic neuron?arrow_forward
- how many molecules of neurotransmitter are in a synaptic vesicle?arrow_forwardDescribe how an action potential in a presynaptic neuron causes a) an excitatory postsynaptic potential; or b) an inhibitory postsynaptic potential in a postsynaptic neuronarrow_forwardWhat is the function of myelin sheaths? Where are they found?arrow_forward
- What is Synaptic Integration?arrow_forwardStarting with the action of a neurotransmitter at the postsynaptic end of a neuron, what happens to generate an action potential to a second neuron?arrow_forwardWhich statement is true regarding the neuron synapse? B) binging of a neurotransmitter on the postsynaptic neuron membrane can generate an action potential in that neuron C) the binding of a neurotransmitter always causes an excitatory effect on that cell, never inhibitory D) the presynaptic and pastsynaptic neuron membranes are not physically separatedarrow_forward
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