Question

Merkel disc in the skin of the rabbit are:
(a) Tangoreceptor
(b) Pain receptor
(c) Thermoreceptor
(d) None of the above

Answer 1

Sensitivity to direct tactual stimuli is found very commonly, from one-celled species to and including humans, i.e. to contact with relatively solid objects. Except for parts protected by dense, rigid shells (as in mollusks) , the entire surface of the body is typically touch-receptive. Mechanical contact deforms the surface of the body locally; receptors are usually touched spots inside the skin or free nerve endings, often associated with specialized structures such as tactile hair.

Complete answer:
Tangoreceptors are also known as contact or tactile receptors on the skin. These are further categorized into six groups that include free nerve endings, root hair plexus, a disc of Merkel, corpuscles of Meissner, corpuscles of Pacinian, and corpuscles of Ruffini. Between epidermal cells, the free nerve endings are located. These are sensitive to pressure as well as touch. To detect touch and hair movement, the root hair plexus is composed of free nerve endings. In the lower epidermal layer of the glabrous or hairless skin, Merkel's discs are found. Reacting to fine touch and pain, these receptors. The corpuscles of Meissner are receptive to light touch and vibrations. The eyelids, tongue, fingertips, nipples, and external genitalia are found in these. Pacinian corpuscles are large external genital receptors. These receptors are sensitive to vibrations of deep pressure and high frequency. They are found in your fingers and breasts as well. The corpuscles of Ruffini are located deep in the dermis and are susceptible to pressure and skin distortions.

Additional information: Pain receptors, also known as nociceptors, are a community of sensory neurons widely distributed in the skin, deep tissues (including muscles and joints) , and most visceral organs, with specialized nerve endings.
A thermoreceptor is a non-specialized sensation receptor that codes absolute and relative temperature changes, mainly within the harmless range, or, more specifically, the receptive portion of a sensory neuron.
So, the correct answer is ‘Tangoreceptor’.

Note: The receptors that respond to touch and pressure are tango receptors. There are cutaneous receptors on the skin that are present. The skin receptors are located next to the afferent neurons and the neurotransmitters are received. The neurotransmitters produce a nerve impulse that is transmitted for perception to the cerebrum. The sensory field for touch is the parietal lobe of the cerebrum.