Question

: Receptors which are sensitive to pain are known as
A. Tangoreceptors
B. Algesireceptors
C. Frigidoreceptors
D. Rheoreceptors

Answer 1

Hint:-Sensory receptors are the organs possessing the nerve endings that are often present in the skin or viscera or nose or ear or eye or mouth. These receptors provide response towards the stimulation. Nociceptors are the receptors for pain. They are present in the skin, joints and muscles as well. They respond to various stimuli in a selective manner. The stimuli may be thermal, chemical (lactic acid) and mechanical (stretching of muscle fiber).

Complete Answer:-
Analgesic Receptors are receptive to pain. In this receptor, an organized end organ is missing, that is the nerve ending is bare. These are also known as nociceptors. In peripheral tissues, the stimuli responsible for the activation of pain receptors are the chemicals, heat and the mechanical (pinch, pressure) stimuli. The heat stimuli and the mechanical stimuli are usually for a very brief period of time as compared to the stimuli of any chemical substance which are generally long lasting. The mechanism of activation of nociceptors by these stimuli is still not known.
On the other hand, Tangoreceptor responds to the stimuli of touch and pressure. These are the cutaneous receptors. Moreover, cold stimulates Frigido Receptors while Rheoreceptor is a receptor which is stimulated via water currents. These are the receptors for the movement and pressure.
So, the correct answer is option “B” that is Algesia Receptors are the receptors which are sensitive towards pain.

Note:- Nociceptors are of three types: Polymodal nociceptors- stimuli detected are chemical, thermal and mechanical. Thermal nociceptors help in detecting the sensation of sharp, cold or burn that elicits the pain while the mechanical nociceptors stimulates pricking and sharp pain.