1 If three letters together represent a single sound, they constitute a trigraph, such as tch in catch and sch in schmaltz. 2  Similarly, to take the consonant trigraph t c h, the teacher can explain that in this word the three letters together âsayâ the sound. Similarly, to take the consonant trigraph t c h, the teacher can explain that in this word the three letters together âsayâ the sound. 2  Both digraphs and trigraphs in French have their origin in history and phonology.
When a reflex arc consists of only two neurons in an animal (one sensory neuron, and one motor neuron), it is defined as monosynaptic. Monosynaptic refers to the presence of a single chemical synapse.he reaction of teh stretch reflex is trying to keep the muscle at the same length by shortening the muscle. The stretch reflex is important for maintaining muscle tone and adjusting it reflexively. Patellar, (knee jerk).
Answered by The Community. Making the world better, one answer at a time. Reflex arc is the path of impulse that travels from receptor (ex. skin) to spinal cord through sensory nerve and from spinal cord to effectors (ex. muscles) through motor nerve.This impulse helps us to perform reflex action.he somatic reflex arc is a neural circuit that travels through the spinal cord. It allows the body to respond to the stimulus before the brain interprets the message/ impulse â¦ .