Chapter 28 Muscular system

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paraxerus
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289303
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Chapter 28 Muscular system
Updated:
2014-11-15 18:46:15
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anatomy
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Anatomy
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  1. In order to function, muscles use a substance we get from carbohydrates called ______ to preforms functions needed in our movement and stability.
    Glycogen
  2. How many muscles are in the human body?
    600 muscles
  3. This reaction provides energy to the body ans warms the body as it occurs

    _____ ----> _____-----> _____
    Carbs ----> Glycogen -----> Glucose
  4. Name the 3 types of muscle tissue
    • skeletal
    • smooth
    • cardiac
  5. Skeletal muscle tissue attaches at _____
    The bone
  6. True or False

    Skeletal muscle is involuntary.
    False

    Skeletal muscle is voluntary
  7. Skeletal muscle cells are described as?
    Long and strong and are arranged in bundles enclosed in connective tissue.
  8. How many functions do skeletal muscles have?
    6
  9. Name the 6 functions of skeletal muscles
    • contractions provide heat
    • contractions prove movement
    • hold the trunk and head erect
    • protect blood vessels and nerves
    • help blood return to the heart
    • provide protective padding for internal organs
  10. Skeletal muscles that bend at joints are called?
    Flexors
  11. Skeletal muscles that straighten out a joint are called?
    extensors
  12. When a flexor muscle is partnered with an extensor muscle they are called a?
    Muscle team
  13. Give an example of a muscle team
    The biceps and Triceps of the upper arm are an example of a flexor/extensor muscle team
  14. Most skeletal muscles are partially _____ at all times so that the body remains _____.
    Contracted, erect
  15. The constant state of contraction is known as?
    Muscle tone
  16. Atrophy
    the wasting away of muscle tissue
  17. Contracture
    Condition where flexor muscles shorten and leave the joint bent permanently.
  18. Fascia
    Muscle Sheaths
  19. membranes that separate muscle groups to prevent friction from movement.
    Muscle sheaths / fascia
  20. Bursae
    A sheath that is shaped like a sac and has a slippery fluid lining that acts as a cushion to minimize pressure and friction.
  21. Small, delicate muscle cells found throughout the internal organs of the body
    Smooth Muscle Tissue
  22. Smooth muscle activity is ______ and occurs constantly such as...
    • Involuntary¬†
    • examples are:
    • breathing, peristalsis, blood vessel contraction, and pupil dilation.
  23. Involuntary contraction of smooth muscle that results from alternate contraction and relaxation of the layers of the smooth muscle, is called?
    Peristalsis
  24. Smooth, donut-shaped muscles that pinch shut intermittently to control the flow of blood, food, or liquid.
    Sphincter Muscle
  25. Muscle tissue that is only found in the heart
    Cardiac muscle tissue
  26. How is the cardiac muscle tissue arranged
    in a continuous network WITHOUT a sheath separation for better electric conduction.
  27. True or False

    When one cardiac cell receives the signal to contract, all neighboring cells are stimulated and contract at different times.
    False

    they all contract together
  28. What two minerals are needed to provide muscle contraction/relaxation?
    Sodium and potassium
  29. If we want our muscle fibers to contract, our muscle cells are flooded with ______, causing our muscle fibers to _____ each other.
    Sodium ions

    Causes fibers to "overlap"
  30. Sodium ions are ______ charged
    Positively

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