Old World rat snakesEdit. 1  Twin-spotted rat snake, Elaphe bimaculata Schmidt, 1925. 2  King rat snake, Elaphe carinata (GÃ¼nther, 1864) 3  Japanese rat snake, E. climacophora (H. Boie, 1826) 4  David's rat snake, E. davidi (Sauvage, 1884) 5  Dione rat snake, E. dione (Pallas, 1773) 6  Japanese four-lined rat snake, E. quadrivirgata (H. Boie, 1826)
Making the world better, one answer at a time. The receptor in the reflex arc of a stretch reflex are 'muscle spindles' which are spindle shaped receptors distributed throughout the belly of the muscle.
The stretch reflex is caused by a stretch in the muscle spindle. When the stretch impulse is received a rapid sequence of events follows. The motor neuron is activated and the stretched muscles, and its supporting muscles, are contracted while its antagonist muscles are inhibited.he stretch reflex can be activated by external forces (such as a load placed on the muscle) or internal forces (the motor neurons being stimulated from within.) An example of the former is a person holding an empty tray in their outstretched arm and then having a plate of food set on it.