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Anaphy > Chapter 7: Muscular System > Flashcards

Chapter 7: Muscular System Flashcards

1
Q
  • set of tissues in the body with the ability to change shape
  • produces body movements, maintains posture, and produces body heat
A

Muscular System

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2
Q

Functions of Muscular System

A
  • Movement of the Body
  • Maintenance of Posture
  • Respiration
  • Production of Body Heat
  • Communication
  • Constriction of Organs and Vessels
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3
Q

General Properties of Muscle Tissue

A
  • Contractility
  • Excitability
  • Extensibility
  • Elasticity
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4
Q

also called as striated muscle because transverse bands/striations can be seen in the muscle under the microscope

A

Skeletal Muscle

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5
Q

3 Connective Tissue Coverings of Muscle

A
  • Epimysium
  • Perimysium
  • Endomysium
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6
Q

connective tissue sheath that surrounds each skeletal muscle

A

Epimysium

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7
Q

loose connective tissue that separates muscle fascicles from each other

A

Perimysium

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8
Q

loose connective tissue that surrounds each muscle fiber

A

Endomysium

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9
Q

Muscle Fiber Structures

A
  • Sarcolemma
  • Transverse tubules, or T tubules
  • Sarcoplasmic Reticulum
  • Sarcoplasm
  • Myofibrils
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10
Q

cell membrane of the muscle fiber

A

Sarcolemma

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11
Q

many tubelike inward folds in the sarcolemma, located along the surface of the muscle fiber

A

Transverse tubules or T tubules

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12
Q

an enlarged portion of the smooth ER that is associated in T tubules

A

Sarcoplasmic Reticulum

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13
Q

cytoplasm of a muscle fiber

A

Sarcoplasm

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14
Q

bundles of protein filaments in the sarcoplasm

A

Myofibrils

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15
Q

basic structural and functional unit of the skeletal muscle and the smallest portion of a skeletal muscle capable of contracting

A

Sarcomeres

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16
Q

separates one sarcomere from the next and a network of protein fibers that forms a stationary anchor for actin myofilaments to attach

A

Z-disks

17
Q
  • dark
  • consists of an overlap between actin and myosin myofilaments
  • extends length of myosin myofilaments
  • stays same size during contraction
A

A-band

18
Q
  • Light
  • consists of actin myofilaments only
  • decrease in size during contraction
  • spans each Z disk and ends at myosin myofilaments
A

I-band

19
Q
  • smaller, lighter staining regioon in the center of each A band
  • contains only myosin myofilaments
A

H-zone

20
Q

consists of fine protein filaments that anchor the myosin myofilaments in place

A

M-line

21
Q
  • thin filaments
  • consists of actin, troponin, and tropomyosin
A

Actin

22
Q

binding sites for calcium ions

A

Troponin

23
Q

block myosin myofilament binding sites on actin myofilament in an unstimulated muscle

A

Tropomyosin

24
Q

thick filaments and resembles bundles of tiny golf clubs

A

Myosin

25
Q

highly specialized, electrically excitable cells that are polarized which creates an electrical charge difference across the cell membrane

A

Muscle Fibers

26
Q
A

Anaphy (10 decks)

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