Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 41, Problem 10TYK
Summary Introduction
Introduction:
Temperature is detected by thermoreceptors in the form of cold or heat. The nociceptors are pain receptors present in the skin and certain internal organs of body. The pain receptors receive signals from damaged skin and transmit those signals to the brain. They are non-adaptive, that is, a person cannot bear extreme pain for a very long period of time. Analgesics are used to cure pain temporarily.
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Which of the following statements about the intensity of a nerve response is true?
a. A stimulus reaching the threshold level may or may not propagate a nerve impulse.
b. A stimulus resulting in a greater voltage shift will result in a stronger nerve impulse and increased sense of perception in the brain.
c. All stimuli, regardless of the strength, will always generate a nerve impulse.
d. A small voltage shift and a large voltage shift will yield the same nerve impulse as long as the stimulus reaches the threshold level.
Local anesthetics "block" the action potential and therefore do not allow
"pain" information to proceed to the brain and spinal cord. In the presence
of these molecules (local anesthetics) 'threshold' is essentially "ignored".
The molecules most logically work by:
23.
a. Decreasing the intracellular [potassium]
b. Blocking the opening of the voltage-gated potassium channels
c. Decreasing the extracellular [sodium]
d. Blocking the opening of the voltage-gated sodium channels
The gate-control theory of pain proposes thata. special pain receptors send signals directly to the brain.b. pain is a property of the senses, not of the brain.c. small spinal cord nerve fibers conduct most pain signals,but large-fiber activity can close access to those painsignals.d. the stimuli that produce pain are unrelated to othersensations.
Chapter 41 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 41.1 - Prob. 1SBCh. 41.1 - Prob. 2SBCh. 41.2 - Prob. 1SBCh. 41.2 - What properties qualify proprioceptors as...Ch. 41.3 - What vibration-detecting systems are found in...Ch. 41.3 - Prob. 2SBCh. 41.4 - For vertebrate photoreception, define: (a)...Ch. 41.5 - How do we distinguish different kinds of smells?Ch. 41.5 - Prob. 2SBCh. 41.6 - Prob. 1SB
Ch. 41.7 - What are three ways electroreceptors are used in...Ch. 41 - An ambulance siren in close proximity to a dog can...Ch. 41 - Prob. 2TYKCh. 41 - Which of the following situations is associated...Ch. 41 - Prob. 4TYKCh. 41 - Prob. 5TYKCh. 41 - The eyes of vertebrates and cephalopods are...Ch. 41 - Which of the following events does not occur...Ch. 41 - Prob. 8TYKCh. 41 - Prob. 9TYKCh. 41 - Prob. 10TYKCh. 41 - Discuss Concepts In owls and many other birds of...Ch. 41 - Prob. 12TYKCh. 41 - Prob. 13TYKCh. 41 - Prob. 14TYKCh. 41 - Prob. 15TYKCh. 41 - Prob. 1ITDCh. 41 - Prob. 2ITDCh. 41 - Prob. 3ITD
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