1.05 Understand the functions and disorders of the muscular system

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1.05 Understand the functions and disorders of
the muscular system
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1.05 Understand the functions and disorders of
the muscular system

• What are the characteristics of muscles?
• What are the functions of the muscular system?
• What are common disorders of the muscular system?
• How are muscular disorders treated?
• How does the muscular system relate to the bodys
  support and movement?

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Characteristics of Muscles

• Contractibility
• Excitability
• Extensibility
• Elasticity

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Characteristics of Muscles

• Contractibility

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Characteristics of Muscles

• Contractibility
• Myoneural stimulation
• contraction of muscle proteins
• movement and heat

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Characteristics of Muscles
Contractibility Neurotransmitter at site of
muscle stimulus.

• The sodium-potassium pump of the membrane of a
  muscle cell.
• The purpose of this slide is to illustrate the
  complexity of the process of movement.

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Characteristics of Muscles

• Excitability

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Characteristics of Muscles

• Extensibility

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Characteristics of Muscles

• Elasticity

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Characteristics of Muscles

• Contractibility
• Excitability
• Extensibility
• Elasticity

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Muscle Tone

• Discuss muscle tone.
• Atrophy
• a- ________ -trophy ________
• Hypertrophy
• hyper- _______ -trophy ________

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Muscle Tone

• John just got a cast off his leg. His calf
  muscle on the affected leg is 1 smaller in
  diameter than his other calf muscle.
• What happened?
• How do you explain this to him?

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Muscle ToneExercise Training

• What are the advantages of exercise?
• Are there any disadvantages of exercise?

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Muscle Fatigue

• Discuss muscle fatigue
• What causes muscle fatigue?
• How does the body correct muscle fatigue?
• Is muscle fatigue dangerous? Why / why not?
• Discuss aerobic and anaerobic exercise.
• Give examples of each.

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Functions of the Muscular System

• What are the functions of the muscular system?

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MovementSkeletal Muscle

• Receptors in muscles provide the brain with
  information about body position and movement.
• The brain controls the contraction of skeletal
  muscle.

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Movement

• Discuss the mechanism of skeletal muscle movement
  to include
• Point of origin
• Point of insertion
• Identify the
• Prime mover
• Antagonist
• Synergists

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MovementDigestive System

• The nervous system regulates the speed at which
  food moves through the digestive tract.

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MovementCirculatory SystemHeartbeat

• The nervous system and hormones regulate the
  speed at which the heart beats.

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Posture

• How does the muscular system effect posture?

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Body Heat

• What is the bodys response to cold? Why?
• How is this response helpful?
• How does the body respond to exercise? Why?

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Myopathy

• Myo-
• -pathy

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Fibromyalgia

• Discuss the pictures and how they relate to
  fibromyalgia.
• Cause
• Symptoms
• Diagnosis
• Treatment
• Prognosis

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Hernia

• Discuss hernias.
• Causes
• Locations
• Symptoms
• Diagnosis
• Treatment
• Prevention

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Muscle Spasms(Involuntary hypertonicity)

• Discuss muscle spasms.
• Causes
• Locations
• Symptoms
• Diagnosis
• Treatment
• Prognosis

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Muscular Dystrophy

• Discuss the picture and how it relates to
  muscular dystrophy.
• Cause
• Symptoms
• Diagnosis
• Treatment
• Prognosis

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Myasthenia Gravis

• Discuss the picture and how it relates to
  myasthenia gravis.
• Cause
• Symptoms
• Diagnosis
• Treatment
• Prognosis

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Strain

• What happened here?
• What symptoms is this man having? Why?
• How will he treat them?
• What is his prognosis?

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Tendonitis

• Discuss the pictures and how they relate to
  tendonitis.
• Cause
• Symptoms
• Diagnosis
• Treatment
• Prognosis

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Tetanus

• Discuss the picture and how it relates to
  tetanus.
• Cause
• Symptoms
• Diagnosis
• Treatment
• Prognosis

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1.05 Understand the functions and disorders of
the muscular system

• What are the characteristics of muscles?
• What are the functions of the muscular system?
• What are common disorders of the muscular system?
• How are muscular disorders treated?
• How does the muscular system relate to the bodys
  support and movement?