Pearson eText Human Physiology: An Integrated Approach -- Instant Access (Pearson+)
8th Edition
ISBN: 9780135212905
Author: Dee Silverthorn
Publisher: PEARSON+
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Chapter 10.2, Problem 8CC
Summary Introduction
To rank: The correct order of fibers on the basis of speed of signal transmission from fastest to slowest.
Introduction: The signal is transmitted from one neuron to another through the electric impulse. The electric impulse generated by the stimulus travel through the axon of one neuron to the dendrite of another neuron.
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Which of the following is true regarding the difference between graded and action potentials?
a.) Action potential occur only when the surface of the neuron is myelinated, but graded potentials occur in both in both myelinated and non-myelinated neurons.
b.) The magnitude of action potential depends on the magnitude of the stimulus, whereas graded potentials are all or none.
c.) The magnitude of graded potential depends on the magnitude of the stimulus, whereas action potentials are all or none.
Identify and label the following structures on the neuron model figure below: cell body, dendrites,
neuron nucleus, neurolemma, axon hillock, nucleus of Schwann cell, Nissl bodies, myelin sheath,
axon, node of Ranvier, axon terminals (of neurons synapsing with model neuron), endoneurium (refer
to Figure 10.6).
3)
11
Action potentials move along different axons at different speeds. The slowest speed of conduction will be found in
A) large unmyelinated axons
B) small unmyelinated axons
C) large myelinated axons
D) small myelinated axons
Chapter 10 Solutions
Pearson eText Human Physiology: An Integrated Approach -- Instant Access (Pearson+)
Ch. 10.1 - What advantage do myelinated axons provide?Ch. 10.1 - What accessory role does the outer ear (the pinna)...Ch. 10.1 - Prob. 3CCCh. 10.1 - In Figure 10.5, what kind(s) of ion channel might...Ch. 10.1 - How do sensory receptors communicate the intensity...Ch. 10.1 - Prob. 6CCCh. 10.2 - Prob. 7CCCh. 10.2 - Prob. 8CCCh. 10.2 - Your sense of smell uses phasic receptors. What...Ch. 10.3 - Create a map or diagram of the olfactory pathway...
Ch. 10.3 - Create a map or diagram that starts with a...Ch. 10.3 - Prob. 12CCCh. 10.3 - Are olfactory neurons pseudounipolar, bipolar, or...Ch. 10.3 - Prob. 14CCCh. 10.3 - Prob. 15CCCh. 10.4 - Prob. 16CCCh. 10.4 - Prob. 17CCCh. 10.5 - Prob. 18CCCh. 10.5 - Would a cochlear implant help a person who suffers...Ch. 10.5 - Prob. 20CCCh. 10.5 - Prob. 21CCCh. 10.5 - Prob. 22CCCh. 10.5 - Prob. 23CCCh. 10.6 - What functions do the aqueous humor serve?Ch. 10.6 - Prob. 25CCCh. 10.6 - Prob. 26CCCh. 10.6 - Prob. 27CCCh. 10.6 - Prob. 28CCCh. 10.6 - Prob. 29CCCh. 10.6 - Some vertebrate animals that see well in very low...Ch. 10.6 - Prob. 31CCCh. 10.6 - Macular degeneration is the leading cause of...Ch. 10.6 - Prob. 33CCCh. 10.6 - Draw a map or diagram to explain...Ch. 10 - What is the role of the afferent division of the...Ch. 10 - Prob. 2RQCh. 10 - Prob. 3RQCh. 10 - Prob. 4RQCh. 10 - Prob. 5RQCh. 10 - Prob. 6RQCh. 10 - Prob. 7RQCh. 10 - When a sensory receptor membrane depolarizes (or...Ch. 10 - Prob. 9RQCh. 10 - The organization of sensory regions in the _____...Ch. 10 - Prob. 11RQCh. 10 - Prob. 12RQCh. 10 - Prob. 13RQCh. 10 - Prob. 14RQCh. 10 - Prob. 15RQCh. 10 - Which structure of the inner ear codes sound for...Ch. 10 - Prob. 17RQCh. 10 - Prob. 18RQCh. 10 - Prob. 19RQCh. 10 - Prob. 20RQCh. 10 - Prob. 21RQCh. 10 - Prob. 22RQCh. 10 - Prob. 23RQCh. 10 - Prob. 24RQCh. 10 - Prob. 25RQCh. 10 - Trace the neural pathways involved in olfaction....Ch. 10 - Prob. 27RQCh. 10 - Prob. 28RQCh. 10 - Prob. 29RQCh. 10 - Map the following terms related to vision. Add...Ch. 10 - Prob. 31RQCh. 10 - Prob. 32RQCh. 10 - Prob. 33RQCh. 10 - Prob. 34RQCh. 10 - Prob. 35RQCh. 10 - Consuming alcohol depresses the nervous system and...Ch. 10 - Prob. 37RQCh. 10 - A clinician shines a light into a patients left...Ch. 10 - An optometrist wishes to examine a patients...Ch. 10 - The iris of the eye has two sets of antagonistic...Ch. 10 - As people age, their ability to see at night...Ch. 10 - The relationship between focal length (F) of a...
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- 9) the period after an initial stimulus when a neuron can not be sensitive to another stimulus is the ....? a) resting period b) relative refractory period c) depolarization d) absolute refractory periodarrow_forward23) myelination of an axon is decreases the speed of actio potential. a) true b) falsearrow_forwardwhich of the following would be true (more than one can be true)? a) summation of A and X would reach threshold b) summation of C and A would be a graded potential c) stimulation by A would depolarize cell d) stimulation by B would be a subthreshold depolarization e) summation of B and C would be a graded potential with the net value of 12 mV depolarizationarrow_forward
- During the refractory period a) if a neuron reaches threshold the action potential goes to completion b) No stimulus of any strength will trigger a new action potential c) It is possible to trigger a new action potential but only with an unusually strong stimulus d) The signal grows weaker with distance e) The neuron fires at its maximum voltage if a stimulus depolarizes the neuron to thresholdarrow_forwardIn a myelinated axon a special form of propagation occurs known as saltatory conduction. a). Explain how this form of propagation occurs? b). What is the main benefit of this form of propagation?arrow_forwardWhat is a typical speed of action potential propagation in the absence of myelination? (Not the maximum speed, just the typical speed). A) 1 m/min B) 1 m/sec C) 10 m/sec D) 100 m/sec E) 1000 m/secarrow_forward
- Applying a pressure stimulus to the fluid-filled capsule of an isolated Pacinian corpuscle causes a brief burst of action potentials in the afferent neuron, which ceases until the pressure is removed, at which time another brief burst of action potentials occurs. If an experimenter removes the capsule and applies pressure directly to the afferent neuron ending, action potentials are continuously fired during the stimulus. Explain these results in the context ofadaptation.arrow_forwardName four types of glial cells in the Central Nervous System, and list a function for each of these cells: Type of glial cell Functions а. b. C. d. Name the Peripheral Nervous System (PNS) glial cell that forms myelin: (0.5 points) Name the PNS glial cell that ssurrounds neuron cell bodies in ganglia:(0.5 points)arrow_forward1) Draw a pseudo-unipolar neuron synapsing onto a dendrite on a multi-polar neuron. Label the cell body on both neurons and the synaptic cleft. 2) Draw a typical neuron and the relative ion concentrations (high or low) for Na+ and K+ inside and outside the cell. 3) If a cation channel suddenly opened at rest which direction would K+ move and why? Which way would Na+ ions move? 2arrow_forward
- Using 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_forwardLocal anesthetic is often used in dentistry to lessen the sensation of pain during dental procedures. It prevents propagation of nerve conduction by decreasing the flow of ions. a. Describe how depolarization of an action potential can be blocked by the use of local anesthetic. b. Your classmate explained that once the threshold potential has been reached, the inside charge of the neuron is more positive than the outside charge. Is she correct? Can you compare the inside charge to the outside charge in an axon treated with local anesthetic?arrow_forwardWhich statement regarding neurotransmission through myelinated and unmyelinated neurons is true? a.) Neurotransmissin takes place in myelinated neurons but not unmyelinated neurons. b.) Neurotransmission is generally faster in myelinated neurons than in unmyelinated neurons. c.) Neurotransmisson is generally faster in unmyelinated neurons than in myelinated neurons. d.) Neurotransmission takes place in unmyelinated neurons but not in myelinated neurons.arrow_forward
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