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Anatomy and Physiology > Muscular system > Flashcards

Muscular system Flashcards

1
Q

Muscles

A

Muscle fibers that contract and flex to create movement

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2
Q

Types of muscle

A
  1. Skeletal
  2. Cardiac
  3. Smooth
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3
Q

Skeletal muscle anatomy

A
  1. Epimysium
  2. Perimysium
  3. Fascia
  4. Endomysium
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4
Q

Skeletal muscle anatomy

Connective tissue sheathing a muscle

A

Epimysium

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5
Q

Skeletal muscle anatomy

Surrounds muscle outside the epimysium

A

Fascia

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6
Q

Skeletal muscle anatomy

Connective tissue surrounding each fasciculuc

Fasciculus - bundle of muscle fiber

A

Perimysium

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7
Q

Skeletal muscle anatomy

Surrounds muscle fiber

A

Endomysium

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8
Q

Skeletal muscle anatomy

plasma membrane of muscle cell

A

Sacrolemna

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9
Q

Skeletal muscle anatomy

cytoplasm of muscle cell

A

Sacroplasm

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10
Q

Skeletal muscle anatomy

Where actin and myosin are parallelel

A

Myofibrils

Actin - thin filaments
Myosin - thick filaments

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11
Q

Skeletal muscle anatomy

Attaches muscle to bone

A

Tendon

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12
Q

Skeletal muscle anatomy

Flat extensions of muscle acting like tendons

A

Aponeurosis

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13
Q

Skeletal muscle anatomy

Surrounds epimysium

A

Deep fascia

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14
Q

Skeletal muscle anatomy

Superficial fascia

A

Skin

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15
Q

Muscle contraction

A
  1. ATP binds to myosin, forming ADP
  2. Ca exposes binding sites in actin
  3. myosin heads attach to actin
  4. Transfer of ADP causes movement (muscle contraction)
  5. myosin head releases (muscle relax period)
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16
Q

Phases of muscle contraction

A
  1. Latent
  2. Contraction
  3. Relaxation
  4. Refractory
17
Q

Phases of muscle contraction

Time required for Ca to release

A

Latent period

18
Q

Phases of muscle contraction

Actual muscle contraction

A

Contraction period

19
Q

Phases of muscle contraction

Ca returned to sacroplasmic reticulum

A

Relaxation period

20
Q

Phases of muscle contraction

time immediately after stimulus

A

Refractory period

21
Q

Types of contractions

A
  1. Isotonic
  2. Isometric
22
Q

Types of contractions

Muscle changes length during contraction

A

Isotonic

23
Q

Types of contractions

Muscle doesn’t change in length during contraction

A

Isometric

Anatomy and Physiology (6 decks)

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