A reflex that causes muscle relaxation and lengthening in response to muscle tension is called a ________.
A) tendon reflex
B) flexor reflex
C) crossed-extensor reflex
D) plantar reflex

Question

Quizplus · Accepted Answer

A tendon reflex, also known as a stretch reflex, is a reflex in which a muscle contraction is elicited in response to stretching of the muscle. This reflex is important for maintaining muscle tone and posture, and it involves a sensory neuron, a motor neuron, and an interneuron that synapses in the spinal cord. When a muscle is stretched, sensory receptors called muscle spindles in the muscle fibers send signals to the spinal cord that activate alpha motor neurons, which in turn cause the muscle to contract. This reflex also causes the opposing muscle to relax, which helps to prevent injury and maintain balance.

A Reflex That Causes Muscle Relaxation and Lengthening in Response