Figure 36.5 Which of the following statements about mechanoreceptors is false?
- Pacini corpuscles are found in both glabrous and hairy skin.
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.
The statement about mechanoreceptors that is Meissner’s corpuscles extend to lower epidermis is false.
Hence, Option (d) is correct.
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