In which of these reflexes, a skeletal muscle contraction causes the agonist muscle to simultaneously lengthen and relax?
Correct answer: C. Golgi tendon reflex
- A. Stretch reflex
- B. Spinal reflex
- C. Golgi tendon reflex
- D. Crossed Extensor Reflex
Explanation
The Golgi tendon reflex (also called inverse stretch reflex, autogenic inhibition, tendon reflex) is an inhibitory effect on the muscle resulting from the muscle tension stimulating Golgi tendon organs (GTO) of the muscle, and hence it is self-induced. When the GTD is activated during contraction, it causes inhibition of the contraction (autogenic inhibition), which is an automatic reflex. When the GTO is activated during stretching, it inhibits muscle spindle activity within the working muscle (agonist) so a deeper stretch can be achieved.
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About Coordination and Control
Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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