Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 36, Problem 27CTQ
What can be inferred about the relative sizes of the areas of cortex that process signals from skin not densely innervated with sensory receptors and skin that is densely innervated with sensory receptors?
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Students have asked these similar questions
What are the two types or classes of auditory hair cells and explain how they are different in terms of efferent and afferent neural fiber signaling.
Given that receptive fields for touch do not exhibit uniform sensitivity across their whole extent, describe the two patterns of response sensitivity. And do these two types convey essentially the same or different information to the brain?
What is the best physiological explanation as to why a particular area has a low two-point threshold?
A greater skin surface area always results in a lower two-point threshold because there is physically more room in which to house
sensory receptors.
With a low two-point threshold, there is a greater density of sensory receptors to allow for more precise location of the sensation
by the somatosensory cortex.
O A low threshold suggests a decreased sensation in that area, meaning a wide receptive field on that area of skin.
Chapter 36 Solutions
Biology 2e
Ch. 36 - Figure 36.5 Which of the following statements...Ch. 36 - Figure 36.14 Cochlear implants can restore hearing...Ch. 36 - Figure 36.18 Which of the following statements...Ch. 36 - Where does perception occur? spinal cord cerebral...Ch. 36 - If a person’s cold receptors no longer convert...Ch. 36 - After somatosensory transduction, the sensory...Ch. 36 - Many people experience motion sickness while...Ch. 36 - ________ are found only in skin, and detect skin...Ch. 36 - If you were to burn your epidermis, what receptor...Ch. 36 - Many diabetic patients are warned by their doctors...
Ch. 36 - Which of the following has the fewest taste...Ch. 36 - How many different taste molecules do taste cells...Ch. 36 - Salty foods activate the taste cells by. exciting...Ch. 36 - All sensory signals except_____travel to The...Ch. 36 - How is the ability to recognize the umami taste an...Ch. 36 - In sound, pitch is measured in____T and ____...Ch. 36 - Auditory hair cells are indirectly anchored to the...Ch. 36 - Which of the following are found both in the...Ch. 36 - Benign Paroxysmal Positional Vertigo is a disorder...Ch. 36 - Why do people over 55 often need reading glasses?...Ch. 36 - Why is it easier to see images at night using...Ch. 36 - A person catching a ball must coordinate her head...Ch. 36 - A satellite is launched into space, but explodes...Ch. 36 - If a person sustains damage to axons leading from...Ch. 36 - In what way does the overall magnitude of a...Ch. 36 - Describe the difference in the localization of the...Ch. 36 - What can be inferred about the relative sizes of...Ch. 36 - Many studies have demonstrated that women are able...Ch. 36 - From the perspective of the recipient of the...Ch. 36 - What might be the effect on an animal of not being...Ch. 36 - A few recent cancer detection studies have used...Ch. 36 - How would a rise in altitude likely affect the...Ch. 36 - How might being in a place with less gravity than...Ch. 36 - How does the structure of the ear allow a person...Ch. 36 - How could the pineal gland, the brain structure...Ch. 36 - How is the relationship between photoreceptors and...Ch. 36 - Cataracts, the medical condition where the lens of...
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- Why do we observe different responses to a touch stimuli in parallel maps in areas 1 and 3b of the somatosenory cortex?arrow_forwardHow can the pattern of distribution for touch receptors in the regions of the skin be described?arrow_forwardWhat three types of mechanoreceptors respond to stretching, compression, twisting, or other distortions of the cell membrane?arrow_forward
- In the process of sensory coding Recruitment of additional neurons occurs with a weak stimulus in order to make the stimulus stronger. The larger the receptive field of a sensory receptor, the greater the expected acuity and the more accurate the two-point discrimination. Lateral inhibition of neighboring receptors resulting in a relative reduction of action potentials in the neighboring second order neurons would be expected to increase acuity. A receptor potential that remains suprathreshold into the absolute refractory period will result in additional action potentials.arrow_forwardFill out the information indicated for tactile receptors in the table below: Name Structure Location Function. (encapsulated or unencapsulated?) Tactile disc Tactile corpuscle Free nerve endings End bulb Bulbous corpuscle Root hair plexus Lamellated corpusclearrow_forwardBased on the same attached figure as above (Figure 10.9 in your textbook), what kind of channel permits K+ to pass through the apical-end membrane in hair cells of the ear? (A) Spiral ganglion Tectorial membrane Scala vestibuli Inner hair cells -45 mV Scala tympani Outer hair cells Scala media Organ of Corti Perilymph Low K+ 0mV Endolymph High K+ +80 mV (B) Stria vascularis Basilar membrane Ca²+ Afferent. nerve Depolarization O Nucleus wwww. 00 -Depolarization. Vesicles -Transmitter To brain C₂24arrow_forward
- Eskimos wear a great deal of clothing and have limited exposure to uv light, but do not suffer from Vitamin D deficiency. Why? A person who has been playing in the snow notices that their fingertips are very pale. why? Where would you expect to find a high concentration of Merkel discs and other tactile corpuscles? Why? An old wives' tale says that if you keep hair trimmed at the ends, it will grow faster. Please discuss why this is not true. Explain why you can scrap your skin but not bleed.arrow_forwardYou 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 spindlearrow_forwardReceptor A has a circular receptive field on the skin with a diameter of 2.5 cm. Receptor B has a circular receptive field 7.0 cm in diameter. Which receptor provides more precise sensory information?arrow_forward
- 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 adaptingarrow_forwardHow does the sensory transduction mechanism in the vestibular and auditory systems demonstrate the importance of the general principle of physiology that controlled exchange of materials occurs between compartments and across cellular membranes?arrow_forwardHow do temperature receptors appear to be distributed in the skin of the palm?arrow_forward
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