Aside from motor unit recruitment, we are able to vary contractile force in the muscle in one other way – rate coding. Rate coding refers to the adjustment in firing rate of the neural impulses which travel down the motor neuron. As the intensity of the stimulus increase, the firing rates of motor units increase and more force can be produced.
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Type II motor units are called fast-twitch motor units because of this quicker response time. Another common name is the phasic motor unit, because Type II motor units are recruited after Type I motor units to provide short bursts, or phases, of higher muscle tension as required. Type II motor units have two subcategories. Buy at this store.See Detail Online And Read Customers Reviews The Motor Unit In Vertebrate Skeletal Muscle Refers To prices throughout the online source See people who buy "The Motor Unit In Vertebrate Skeletal Muscle Refers To" Make sure the store keep your private information private before you buy The Motor Unit In Vertebrate Skeletal Muscle Refers To Make sure you can proceed credit card ... Each type of motor unit possesses different characteristics. Most people have heard the terms fast and slow twitch muscles. This refers to the specific characteristics of the different motor units. Muscles contain some combination of all three fiber types (not just one motor unit is responsible for the whole thing). consists of a motor neuron and all the muscle fibers it innervates. ... where motor neuron and fiber intersect. the location where the axon terminal of the neuron meets a specialized region of the muscle fiber's plasma membrane. The specialized region is called the motor end plate. The term motor unit refers to one lower motor neuron. Let me just draw a soma, and an axon coming out of this lower motor neuron. I'm going to draw this one just having two axon terminals, although they can have lots of axon terminals, but this one we'll just say has two.
THE MOTOR UNIT . Motor unit consists of a motor neuron and the group of skeletal muscle fibers which it innervates. Three types of motor units are found in skeletal muscle. The largest of these are the type A motor units, which are characterized by high contractile speed and power.