<prompt> Which of the following reflexes is monosynaptic?AchillesBabinskiCornealExtensor plantar  <response>: The Achilles reflex, or ankle jerk reflex, is a myotatic monosynaptic stretch reflex that is mediated by cord segment S1. It is the simplest reflex arc in which there is a single synapse between the afferent and efferent neurons. Reflex arcs in which interneurons are interposed between the afferent and efferent neurons are called polysynaptic reflexes. Some impoant myotatic reflexes: Biceps C5, C6 spinal nerve; Triceps C7 spinal nerve; Patellar L4 spinal nerve. 