Which of the following types of receptors is normally responsible for pain sensa

Question

Which of the following types of receptors is normally responsible for pain sensation (nociception) in the skin? Pacinian corpuscles Free nerve endings Merkel's disks Meisner's corpuscle None of the above Which of the following is/are TRUE of phasic responses in peripheral somatosensory receptor cells of skin? They are especially important for detecting when the intensity of a mechanical stimulus is changing. They are useful for detection of textures and vibration. They usually require specialized and elaborate myelin sheaths that surround sensory nerve endings. Their largest responses are at the onset and offset of a mechanical stimulus All of the above The term "acuity" in sensory systems refers to: The ability of a sensory system to determine that two stimuli applied close together in space (for example on the surface of the skin) are actually distinct. Whether or not the receptive field has a center-surround organization The sensitivity of the system to very low levels of sensory excitation The type of energy that the system can transduce (light, pressure, chemicals, etc.) All of the above In certain sensory systems, such as taste, the term "sensory unit" refers to: An action potential in a sensory cell A specialized non-excitable sensory receptor cell and its associated neuron The G protein coupled receptors, G proteins, and effector enzymes that work together in a sensory cell The entire body surface that can a particular cell to respond to a stimulus The total of all of the mechanical receptors located in an area of skin

Explanation / Answer

1) Free nerve endings are the receptors which are normally responsible for pain sensation in the skin.So i think option B is correct

3) Acuity is nothing but physical ability of sensory organs to recieve input.They are used to determine two stimuli applied closed together in space are actually distinct.

4) It refers to an action potential of the sensory cell because each sensory cell has its own action potential.So coming to taste,tongue respond to the action and the sensory cell of the tongue reacts to the taste.So i think option A is correct.

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