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

The question is asking which of the following responses is least likely to occur if a sudden painful stimulus is applied to one of the limbs.

Here are the answer choices:

a) a rapid flexing of the affected limb b) a rapid extension of the contralateral limb c) activation of A-delta nociceptor axons which trigger reflex responses d) a rapid flexing of the contralateral limb e) activation of C-fibre nociceptors which give rise to a painful sensation that outlasts the stimulus

Let's go through each of the options:

a) This is likely to occur as a reflex response to protect the affected limb from further harm.

b) This is also likely to occur as a reflex response to maintain balance and protect the body from falling.

c) Activation of A-delta nociceptor axons is a common response to painful stimuli. These axons are responsible for the initial sharp pain felt after an injury.

d) This is the least likely to occur. The contralateral limb (the limb on the opposite side of the body) would not typically flex in response to a painful stimulus applied to the other limb.

e) Activation of C-fibre nociceptors is also a common response to painful stimuli. These nociceptors are responsible for the dull, throbbing pain that follows the initial sharp pain of an injury.

So, the answer is d) a rapid flexing of the contralateral limb.