Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892



Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

The sensation of sheets lessens if you lie still in bed. This response is due to:

a. sensory adaptation of mechanoreceptors.

b. sensory adaptation of nociceptors.

c. pH change receptors associated with sleep.

d. the vestibular apparatus.

e. vibration-detecting systems.

Summary Introduction


Different regions of the brain receive signals from different sense organs via afferent nerve fibers. For example, the visual stimulus is received by visual cortex of brain and olfactory stimulus is received by olfactory region. The stimuli are received by sensory receptors that are present in skin, eyes, ears, nose, and tongue. There are mainly five types of receptors, namely nociceptors, mechanoreceptors, thermoreceptors, chemoreceptors, and photoreceptors.


Explanation/justification for the correct answer:

Option (a) is mechanoreceptors. Mechanoreceptors are those nerve receptors that get activated in response to a mechanical stimulus that deforms a membrane. The mechanoreceptors sense a pressure wave like a slight touch or pressure applied on skin. The auditory canal has small hair that act as mechanoreceptors as they sense sound waves.

Humans are the only species that wear clothes. Further, as humans grow, they become adapted to the touch of clothes. The touch sensation is received by skin with the help of mechanoreceptors. The humans adapt to bed sheet or any other piece of clothing as we have adapted to the touch of cloth from the time we were born. Hence, option (a) is the correct answer.

Explanation for incorrect answer:

Option (b) is nociceptors. Nociceptors are pain receptors, which are present in skin and respond to a chemical stimulus that is released during skin abrasion...

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