Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 45.3, Problem 1R
Summary Introduction
To review:
The reason because of which different types of mechanoreceptor cells have different rates of adaptation.
Introduction:
The receptors that respond to mechanical stress by opening their cation channels when disturbed by the physical process are called mechanoreceptors. There are mainly four types of mechanoreceptors in the skin namely, Merkel’s discs, Meissner’s corpuscles, Ruffini endings, Pacinian corpuscles. All the four have different rates of adaptation or receptor sensitivity.
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You want to record membrane potential changes in axons of neurons that process different types somatosensory information. Which sequence ranks the speed of maximum firing rate from slowest to fastest that you predict you will record
a)
muscle spindle < cutaneous mechanoreceptor < pain and temperature
b)
pain and temperature < muscle spindle < cutaneous mechanoreceptor
c)
cutaneous mechanoreceptor < pain and temperature < muscle spindle
d)
cutaneous mechanoreceptor < muscle spindle < pain and temperature
e)
muscle spindle < pain and temperature < cutaneous mechanoreceptor
f)
pain and temperature < cutaneous mechanoreceptor < muscle spindle
You conduct an experiment in the lab to determine the adaptation rate of
different touch receptors. Based on the data shown here, what can you conclude?
(the top trace for each receptor is the stimulus and the bottom trace for each
receptor is the receptor response)
|||||
Receptor A
Receptor B
||||||||||||—–—–
Receptor A is slow adapting and receptor B is slow adapting
Receptor A is fast adapting and receptor B is fast adapting
Receptor A is fast adapting and receptor B is slow adapting
Receptor A is slow adapting and receptor B is fast adapting
Why can tactile stimulus be localized in parts of our body better than other parts?
Chapter 45 Solutions
Life: The Science of Biology
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- Jeremy stubbed his toe on his dresser. He immediately began rubbing his toe to ease the pain. Which concept best explains this method of pain reduction? Expectancy theory Gate-control theory Opponent-process theory Phantom limb Trichromatic theoryarrow_forwardWhat does mindful listening means?arrow_forwardDo cold receptors adapt quickly?arrow_forward
- Which receptor(s) are responsible for our ability for applying the appropriate amount of pressure to grip an object? Tactile cell Meissner's corpuscle Pacinian corpuscle Merkel cellarrow_forwardWhat three types of mechanoreceptors respond to stretching, compression, twisting, or other distortions of the cell membrane?arrow_forwardWhat is mechanoreceptor ? How mechanoreceptor works ?arrow_forward
- What is Tactile Communication ? When does it occur ?arrow_forwardWhat is the role of quorum sensing in responding to environmental changes and external stimuli?arrow_forwardEnvironmental input to different sensory systems affects different neuroanatomical pathways. However, there is a basic, common pathway plan that most sensory systems share. Choose the response option that best describes that plan. receptors --> hindbrain --> midbrain --> cortical association area receptors --> medulla --> hypothalamus --> frontal cortex receptors -> spinal nerves --> midbrain --> temporal cortex receptors >brainstem --> thalamus --> primary cortical areaarrow_forward
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