QuestionSBA
QuestionChoice
This is correct. During a reflex, interneurons branch out from the alpha motor neurones in a specific muscle to innervate the presynpatic terminal of the spindle afferent of the antagonist's muscle. These interneurons therefore directly inhibit the antagonist's muscle. These interneurons are GABAergic and act through metabotropic receptors.
10004281
a
Metabotropic GABAergic receptors
QuestionChoice
This is incorrect. Glycinergic receptors are not involved in this process. During a reflex, interneurons branch out from the alpha motor neurones in a specific muscle to innervate the presynaptic terminal of the spindle afferent of the antagonist muscle. These interneurons therefore directly inhibit the antagonist muscle. These interneurons are GABAergic and act through metabotropic receptors.
10004284
d
Metabotropic glycinergic receptors
QuestionChoice
This is incorrect. Glycinergic receptors are not involved in this process. During a reflex, interneurones branch out from the alpha motor neurones in a specific muscle to innervate the presynaptic terminal of the spindle afferent of the antagonist's muscle. These interneurons therefore directly inhibit the antagonist's muscle. These interneurons are GABAergic and act through metabotropic receptors.
10004283
c
Inotropic glycinergic receptors
QuestionChoice
This is incorrect. Glutaminergic receptors are not involved in this process. During a reflex, interneurons branch out from the alpha motor neurones in a specific muscle to innervate the presynaptic terminal of the spindle afferent of the antagonist's muscle. These interneuroes therefore directly inhibit the antagonist's muscle. These interneurons are GABAergic and act through metabotropic receptors.
10004285
e
Ionotropic glutaminergic receptors
QuestionChoice
This is incorrect. During a reflex, interneurones branch out from the alpha motor neurones in a specific muscle to innervate the presynaptic terminal of the spindle afferent of the antagonist muscle. These interneurons therefore directly inhibit the antagonist muscle. These interneurons are GABAergic and act through metabotropic receptors.
10004282
b
Ionotropic GABAergic receptors
Concept
Chapter
2693
4259
Reflexes
Topic
141
Neurology
13403
During activation of the reflex arc, there is presynaptic inhibition of the antagonist muscle group spindle afferents by the agonist muscle group spindle afferents.

What kind of receptors on the antagonist muscle group spindle afferents does this pathway involve?
a