Motor Units Quiz

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What is the main component of a motor unit?

Motor neuron (correct)

Tendon

Capillary

Muscle fiber

Which type of muscles have many fibers per motor unit?

Muscles responsible for quick movement

Muscles responsible for fine movement

Muscles responsible for complex movement

Muscles responsible for gross movement (correct)

What is the function of motor unit territory?

To concentrate the force of motor units in a specific area

To distribute the force of motor units over a larger area (correct)

To increase the speed of muscle contraction

To decrease the blood supply to muscle fibers

Which motor unit type is named after the fiber type it innervates?

Type II Signup and view all the answers

What is the relationship between motoneuron soma size and fiber type?

Type IIX/b > type IIA > type I Signup and view all the answers

Which fiber type is fatigue resistant?

Type I (Slow Oxidative) Signup and view all the answers

What is the main difference between type I and type II muscle fibers?

Contraction speed and oxidative capacity Signup and view all the answers

What determines the conduction velocity of a nerve signal?

Axon diameter Signup and view all the answers

Which type of muscle fiber has the fastest contraction speed?

Type IIX Signup and view all the answers

What is the main difference in ATP breakdown between type IIA and type IIX fibers?

Type IIX fibers break down ATP faster Signup and view all the answers

What determines the cross-bridge cycle speed in muscle fibers?

Myosin ATPase activity Signup and view all the answers

Which type of muscle fiber has the highest specific force?

Type IIX Signup and view all the answers

What is the main fuel for non-oxidative metabolism in muscle fibers?

Carbohydrates Signup and view all the answers

What determines the contraction speed of myosin heavy chain in muscle fibers?

Myosin ATPase activity Signup and view all the answers

What determines the ability of muscle fibers to undergo rapid and large release and uptake of calcium?

Sarcoplasmic reticulum size Signup and view all the answers

What type of muscle fiber has the highest peak power and at what velocity does it occur?

Type IIX at fast velocity Signup and view all the answers

What type of training can increase the size of all fiber types in a muscle?

Hypertrophic training Signup and view all the answers

What is the test whereby one pedals as hard as possible against a given or a set force?

Windgate test Signup and view all the answers

What type of muscle fibers have similar myofilament and myofibrillar density to slow twitch fibers?

Type IIX Signup and view all the answers

What type of fibers have the ability to generate more peak force at a faster rate?

Type IIX Signup and view all the answers

Motor Units Quiz

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Questions and Answers

What is the main component of a motor unit?

Which type of muscles have many fibers per motor unit?

What is the function of motor unit territory?

Which motor unit type is named after the fiber type it innervates?

What is the relationship between motoneuron soma size and fiber type?

Which fiber type is fatigue resistant?

What is the main difference between type I and type II muscle fibers?

What determines the conduction velocity of a nerve signal?

Which type of muscle fiber has the fastest contraction speed?

What is the main difference in ATP breakdown between type IIA and type IIX fibers?

What determines the cross-bridge cycle speed in muscle fibers?

Which type of muscle fiber has the highest specific force?

What is the main fuel for non-oxidative metabolism in muscle fibers?

What determines the contraction speed of myosin heavy chain in muscle fibers?

What determines the ability of muscle fibers to undergo rapid and large release and uptake of calcium?

What type of muscle fiber has the highest peak power and at what velocity does it occur?

What type of training can increase the size of all fiber types in a muscle?

What is the test whereby one pedals as hard as possible against a given or a set force?

What type of muscle fibers have similar myofilament and myofibrillar density to slow twitch fibers?

What type of fibers have the ability to generate more peak force at a faster rate?

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