The Stretch Reflex : (See Figure 13.15). The stretch reflex in its simplest form involves only 2 neurons, and is therefore sometimes called a 2-neuron reflex. The two neurons are a sensory and a motor neuron. The sensory neuron is stimulated by stretch (extension) of a muscle.
Flash floods are the most common flood type in normally-dry channels in arid zones, known as arroyos in the southwest United States and many other names elsewhere. In that setting, the first flood water to arrive is depleted as it wets the sandy stream bed.
About 90% of all tornadoes worldwide occur in the United States. More than half strike within a couple of hundred miles of Missouri and Arkansas. Tornadoes occur frequently in â¦ Missouri, Arkansas, Kansas, Oklahoma, Texas, Tennessee, and Mississippi.They are a bit less frequent in the northern plains states and Ohio Valley. Nearly every state in the USA has had tornadoes at some time.tornado alley) Why they occur is because: they get warm moist air from the gulf of Mexico that collides with cold â¦ dry air from Canada, and they get contained in this area by the mountain ranges that are on either side, when the air collides they swirl around each other causing a tornado. 2 people found this useful.