US Trade Deficit: US Trade Deficit is at a current level of 43.56B, down from 48.17B last month and down from 45.59B one year ago. This is a change of -9.58% from last month and -4.46% from one year ago. Category: International Transactions.
A reflex action, differently known as a reflex, is an involuntary and nearly instantaneous movement in response to a stimulus.Scientific use of the term reflex refers to a behavior that is mediated via the reflex arc; this does not apply to casual uses of the term reflex.cientific use of the term reflex refers to a behavior that is mediated via the reflex arc; this does not apply to casual uses of the term reflex.
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.Stretch of a muscle normally happens when its antagonist contracts, or artificially when its tendon is stretched, as in the knee jerk reflex.Muscles contain receptors called muscle spindles. (See Figure 13.13) These receptors respond to the muscles's stretch.he 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.