Human Physiology: An Integrated Approach (8th Edition)
8th Edition
ISBN: 9780134605197
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Textbook Question
Chapter 8, Problem 9RQ
Arrange the following events in the proper sequence:
- (a) Efferent neuron reaches threshold and fires an action potential.
- (b) Afferent neuron reaches threshold and fires an action potential.
- (c) Effector organ responds by performing output.
- (d) Integrating center reaches decision about response.
- (e) Sensory organ detects change in the environment.
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Students have asked these similar questions
You touch a hot stove and withdraw your hand before you perceive the pain. Identify the neural pathway involved in this response.
a. stimulus --> motor neuron --> interneuron --> brain --> sensory neuron
b. stimulas --> sensory neuron --> interneuron --> brain --> motor neuron
c. effector --> sensory neuron --> interneuron --> brain --> motor neuron --> stimulus
d. effector --> motor neuron --> interneuron --> sensory neuron --> stimulas
e. stimulas --> sensory neuron --> interneuron --> motor neuron
What is the role of the relative refractory period?
Describe how following a threshold stimulus, a action potential is carried along an unmyelinated axon? How does this differ from an action potential passing through a mylenated axon?
Chapter 8 Solutions
Human Physiology: An Integrated Approach (8th Edition)
Ch. 8.1 - Organize the following terms describing functional...Ch. 8.2 - Where do neurohormone-secreting neurons terminate?Ch. 8.2 - What is the difference between a nerve and a...Ch. 8.2 - Draw a chain of three neurons that synapse on one...Ch. 8.2 - What is the primary function of each of the...Ch. 8.2 - Name the two glial cell types that form myelin....Ch. 8.3 - Given the values in Table 8.2, use the Nernst...Ch. 8.3 - Would a cell with a resting membrane potential of...Ch. 8.3 - Would the cell membrane depolarize or...Ch. 8.3 - Match each ions movement with the type of graded...
Ch. 8.3 - Prob. 11CCCh. 8.3 - What is the difference between conductance and...Ch. 8.3 - If you put ouabain, an inhibitor of the Na+-K+...Ch. 8.3 - The pyrethrin insecticides, derived from...Ch. 8.3 - When Na+ channel gates are resetting, is the...Ch. 8.3 - A stimulating electrode placed halfway down an...Ch. 8.3 - Place the following neurons in order of their...Ch. 8.4 - Prob. 18CCCh. 8.4 - Prob. 19CCCh. 8.4 - Prob. 20CCCh. 8.4 - Prob. 21CCCh. 8.4 - Prob. 22CCCh. 8.4 - Classify the H+-neurotransmitter exchange as...Ch. 8.4 - Prob. 24CCCh. 8.4 - Prob. 25CCCh. 8.4 - Is Na+-dependent neurotransmitter reuptake...Ch. 8.5 - In Figure 8.24e, assume the postsynaptic neuron...Ch. 8.5 - In the graphs of Figure 8.24a, b, why doesnt the...Ch. 8.5 - Prob. 29CCCh. 8.5 - Prob. 30CCCh. 8 - List the three functional classes of neurons, and...Ch. 8 - Somatic motor neurons control __________, and...Ch. 8 - Prob. 3RQCh. 8 - Prob. 4RQCh. 8 - Prob. 5RQCh. 8 - Prob. 6RQCh. 8 - Axonal transport refers to the (a) release of...Ch. 8 - Match the numbers of the appropriate...Ch. 8 - Arrange the following events in the proper...Ch. 8 - List the four major types of ion channels found in...Ch. 8 - Prob. 11RQCh. 8 - An action potential is (circle all correct...Ch. 8 - Choose from the following ions to fill in the...Ch. 8 - What is the myelin sheath?Ch. 8 - List two factors that enhance conduction speed.Ch. 8 - Prob. 16RQCh. 8 - Draw and label a graph of an action potential....Ch. 8 - Prob. 18RQCh. 8 - Prob. 19RQCh. 8 - Create a map showing the organization of the...Ch. 8 - Prob. 21RQCh. 8 - Prob. 22RQCh. 8 - Prob. 23RQCh. 8 - Prob. 24RQCh. 8 - The presence of myelin allows an axon to (choose...Ch. 8 - Define, compare, and contrast the following...Ch. 8 - Prob. 27RQCh. 8 - Prob. 28RQCh. 8 - Prob. 29RQCh. 8 - Prob. 30RQCh. 8 - An unmyelinated axon has a much greater...Ch. 8 - The GHK equation is sometimes abbreviated to...Ch. 8 - In each of the following scenarios, will an action...
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- If an axon receives two stimuli close together in time, only one AP occurs. Why?arrow_forwardWhat is the difference between the absolute refractory period versus the relative refractory period?arrow_forwardAreas of myelinated axons create the appearance of _______ matter, while neuron cell bodies and unmyelinated axons create the appearance of ______ matter.arrow_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_forwardWhy can a greater-than-normal stimulus trigger an AP during the relative refractory period but not during the absolute refractory period?arrow_forwardWhat are the purposes of the Absolute and Relative Refractory Periods?arrow_forward
- what is relative refractory?arrow_forwardDoes the action potential in a single axon increase in amplitude when the stimulus amplitude is increased? Does the amplitude of the CAP increase because more fibers are firing, or the amplitude of the action potentials from single fibers are increasing, or a combination of both?arrow_forwardWhat does afferent, integration and efferent mean?arrow_forward
- Taylor accidentally dips his fingers into a cup filled with steaming hot coffee. He immediately withdraws his hand and then exclaims “ouch!”What is the correct order of the nervous system structures involved in the scenario described above? Select one: a. sensory neuron, effector, motor neuron, interneuron b. motor neuron, receptor, sensory neuron, effector c. receptor, sensory neuron, interneuron, motor neuron d. sensory neuron, interneuron, effector, motor neuronarrow_forwardWhich is the correct order of the firing of a neuron? a. resting potential, threshold, action potential, refractory period b. resting potential, threshold, refractory period, action potential c. action potential, resting potential, refractory period, threshold d. threshold, resting potential, refractory period, action potentialarrow_forwardWhat is the smallest structural and functional unit of nervous system?arrow_forward
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