Diya Chandrasekhar- Chp 6 Myology

How many muscles are in the body?

650

What are the two general characteristics of muscles?

Excitability & Contractility

What does excitability mean?

capacity to generate electrical impulse(action potential)

What does contractility mean?

capacity to shorten in length

What are the only two cells in the body that exhibit excitability?

Muscle & Nerve

What are three functions of the muscles?

Voluntary movement, Maintenance of body posture, and heat production

What is the tendon of origin commonly called?

Head or “ceps”

What does the tendon of origin connect to?

less movable structures

What is the tendon of insertion commonly called?

the ‘tail’ of the muscle

What does the tendon of insertion connect to?

more movable structures

What are the three layers of fascia?

Epimysium, Perimysium, And Endomysium

What does a somatic motor unit consist of?

a neuron motor, and all the muscle fibers it stimulates

What are proprioceptors?

a sensory receptor (such as a muscle spindle) excited by stimuli (such as changes in limb position)

What is an agonist?

muscle that causes a desired action

What is a synergist muscle?

a muscle that acts with an agonist

What is an antagonist muscle?

muscle that causes the opposite action of the antagonist

What is a fixator or stabilizer?

muscle that stabilizes body position and decreases unnecessary movement

What are characteristics of muscles that are used in maximal training?

Anaerobic, low myoglobin content, whiter color

What are characteristics of muscles used in sub-maximal training?

Aerobic, high myoglobin content, darker in color