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

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) A rapid flexing of the affected limb: This is a likely response as it is a reflex action to withdraw the limb from the source of pain.

b) A rapid extension of the contralateral limb: This is also a likely response as it helps to maintain balance when the affected limb is withdrawn.

c) Activation of A-delta nociceptor axons which trigger reflex responses: This is a likely response as A-delta fibers are responsible for the initial sharp pain felt immediately after an injury.

d) A rapid flexing of the contralateral limb: This is less likely to occur as the contralateral limb (the limb on the opposite side of the body) would typically extend to maintain balance, not flex.

e) Activation of C-fibre nociceptors which give rise to a painful sensation that outlasts the stimulus: This is a likely response as C-fibers are responsible for the dull, throbbing pain that follows the initial sharp pain of an injury.

So, the least likely response to a sudden painful stimulus applied to a limb is (d) a rapid flexing of the contralateral limb.

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

Here are the options:

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 option:

a) This is likely to occur as a reflex response to the painful stimulus. The body naturally tries to withdraw the affected limb from the source