The prick of a sharp pin would be the that starts an action potential on a pain neuron.

In order to sense pain, like stepping on a nail,  the signal needs to be relayed from the receptor in the skin to the neurons in the skin and then to the central nevous system.  This signal relay is an action potential.  Describe an action potential.  In your answer be sure to reference the four steps involved, the charges in each step, the movement of ions into and out of the nuron.  Also address which direction the action potential moves in the cell.

Fast pain differs from slow pain in a- being transmitted in the dorsal column pathwayb- evoking a depressor autonomic reactionc- having a sharp qualityd- arising from encapsulated pain receptors

If you pinch your index finger in a door, pain sensations are carried via the _________blank nerve.Multiple Choiceradialmedianaxillarymusculocutaneousulnar

Question 191 ptsIf a sudden painful stimulus is applied to one of the limbs, which of the following is LEAST likely to follow:Group of answer choicesa rapid flexing of the affected limba rapid extension of the contralateral limbactivation of A-delta nociceptor axons which trigger reflex responsesa rapid flexing of the contralateral limbactivation of C-fibre nociceptors which give rise to a painful sensation that outlasts the stimulus

Question 191 ptsIf a sudden painful stimulus is applied to one of the limbs, which of the following is LEAST likely to follow:Group of answer choicesa rapid flexing of the affected limba rapid extension of the contralateral limbactivation of A-delta nociceptor axons which trigger reflex responsesa rapid flexing of the contralateral limbactivation of C-fibre nociceptors which give rise to a painful sensation that outlasts the stimulus PreviousNext