Biology 2e
Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Chapter 36, Problem 1VCQ

Figure 36.5 Which of the following statements about mechanoreceptors is false?

  1. Pacini corpuscles are found in both glabrous and hairy skin.

  • Merkel’s disks are abundant on the fingertips and lips.
  • Ruffini endings are encapsulated mechanoreceptors.
  • Meissner’s corpuscles extend into the lower dermis.
  • Chapter 36, Problem 1VCQ, Figure 36.5 Which of the following statements about mechanoreceptors is false? Pacini corpuscles are

    Expert Solution & Answer
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    Summary Introduction

    Introduction:

    The mechanoreceptors are the type of sensory receptor that responds to mechanical pressure or distortion. The deformation of plasma membranes causes the sensory systems to respond to such stimuli.

    Answer to Problem 1VCQ

    Correct answer:

    The correct answer is Option (d) Meissner’s corpuscles extend into lower dermis.

    Explanation of Solution

    Explanation/justification for the correct answer:

    Option (d) Meissner’s corpuscles extend into lower dermis.

    The Meissner’s corpuscles known as tactile corpuscles are found in the upper epidermis. It is mostly found in the fingertips and eyelids. As it does not extend to lower epidermis, the statement is false.

    This option is correct.

    Explanation for incorrect answers:

    Option (a) Pacini corpuscles are found in both glabrous and hairy skin.

    The Pacini corpuscles are located in the dermis of glabrous and hairy skin. The statement is true.

    So, this option is not correct.

    Option (b) Merkel’s disks are abundant on fingertips and lips.

    The Merkel’s disks are found on found on palms, fingers, soles of feet and lips of humans. It is abundantly found on the fingertips and lips. This statement is true.

    Hence, this option is not correct.

    Option (c) Ruffini endings are encapsulated mechanoreceptors.

    Ruffini endings are found in glabrous and hairy skin. These are encapsulated mechanoreceptors. The statement is true. Hence, this option is incorrect.

    Conclusion

    The statement about mechanoreceptors that is Meissner’s corpuscles extend to lower epidermis is false.

    Hence, Option (d) is correct.

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    Students have asked these similar questions
    Which of the following mechanoreceptors are not found in the skin?   Lamellated corpuscles Proprioceptors Merkel cell fibers Tactile corpuscles
    A rapid breeze causes your hairs to shift on your arms and legs. Which sensory receptor is stimulated? Select one: Lamellated corpuscle Type I cutaneous mechanoreceptors Nociceptors Hair root plexus Type II cutaneous mechanoreceptors
    Which receptors fire at the onset and the offset of stimulation? Select all that apply. Select one or more: Tendon organ Thermoreceptors Type II cutaneous mechanoreceptor (Ruffini corpuscle) Type 1 cutaneous mechanoreceptor (Merkel disc) Lamellated (Pacinian) corpuscle Hair root plexus Corpuscle of touch (Meissner corpuscle)

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