GENERAL HISTOLOGY

Detailed explanation-1: -When a reflex arc consists of only two neurons, one sensory neuron, and one motor neuron, it is defined as monosynaptic. Monosynaptic refers to the presence of a single chemical synapse.

Detailed explanation-2: -When the arc consists of one sensory and motor neuron, it is referred to as a monosynaptic reflex (with ‘monosynaptic’ referring to one synapse). Monosynaptic reflexes include, for example, the biceps and triceps reflexes, and patellar stretch reflex or knee jerk (see figure below).

Detailed explanation-3: -The doctor tapping your tendon is a test of the simple monosynaptic reflex, which consists of a sensor, a sensory neuron, a motor neuron, and a muscle. Once the sensory neuron is activated, an action potential travels along the sensory neuron to the spinal cord.