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).
Some reflexes, such as the muscle stretch reflex, are semi-quantitatively graded. This is also true for responses such as the pupillary light reflex, where the speed of reaction may indicate a sluggish response. On the other hand, many reflexes are simply noted as present or absent.ormal muscle stretch reflexes result in contraction only of the muscle whose tendon is stretched and the agonist muscles (i.e., muscles that have the same action). There is also inhibition of antagonist muscles. Reflexes are graded at the bedside in a semi-quantitative manner.