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Quiz - Joints, Muscle, Myofibril > Skeletal Muscles > Flashcards

Skeletal Muscles Flashcards

1
Q

One skeletal muscle cell is called a

A

muscle fiber

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2
Q

The cytoplasm is called the

A

sarcoplasm

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3
Q

Functional unit of a skeletal muscle fiber that actually shortens during contraction

A

sarcomere

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4
Q

Thick myofilaments are made of the protein

A

myosin

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5
Q

Thin myofilaments are made of the protein

A

actin

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6
Q

Actin bonds to thick myofilaments called

A

troponin

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7
Q

Troponin bonds to calium ions

A

tropomyosin

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8
Q

Calcium is stored within the

A

sarcoplasmic reticulum

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9
Q

T-tubules

A

are extensions of the plasma membrane that run deep within the skeletal muscle fiber

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10
Q

One _____extends between two z-discs.

A

sarcomere

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11
Q

Actin overlaps myosin in the

A

A-band

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12
Q

The I-bands only contains

A

Thin myofilaments

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13
Q

The thin myofilaments attach directly to

A

Z-discs

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14
Q

Springlike molecules that prevent the sarcomere from overstretching

A

Titin

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15
Q

Bundles of muscle fibers

A

fascicle

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16
Q

Epymisium

A

CT covering the entire muscle

17
Q

Perymisium

A

Surrounds each bundle of muscle fibers.

18
Q

Endomysium

A

CT covering each muscle fiber

19
Q

Antagonist

A

Muscle that relaxes while others contract

20
Q

Agonist

A

AKA a prime mover, contracts to carry out a specific movement

21
Q

Synergist

A

Assists the agonist by causing a similar movement by stabilizing a joint

22
Q

Quadriceps femoris

A

Rectus Femoris
Vastus lateralis
Vastus medialis
Vastus intermedialis

23
Q

Hamstring

A

Biceps femoris
Semitendinoses
Semimembranosis

24
Q

Two muscles that contribute to achilles tendon

A

Gastrocnemius

Soleus

25
Q

Rotator cuff

A

Deltoid
Supraspinatus
Infraspinatus
Teres minor

26
Q

Abdominal wall muscles

A

Rectus abdomis
Internal oblique
External oblique
Transverse abdominis

27
Q

Normal inspiration

A

diaphragm

external intercostal

28
Q

Forceful exhalation

A

Tire

Internal intercostal

29
Q

Masseter

A

Chewing food

30
Q

Orbicularis oris

A

Kiss/whistle

31
Q

Orbicularis oculi

A

Close eyes

32
Q

Sternocleidomastoid left

A

rotate head to right shoulder

33
Q

Sternocleidomastoid right

A

tilt to right shoulder

34
Q

Erector spinae

A

Keeps posture extends the spine

35
Q

Compress the abdomen

36
Q

Flex vertebral column as you bend fwd from the waist

Quiz - Joints, Muscle, Myofibril (3 decks)

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