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ATI TEAS EXAM > Muscular System ANATOMY > Flashcards

Muscular System ANATOMY Flashcards

1
Q

The Muscular System

A

Integrated system of the body that is vital for controlling voluntary and involuntary movements.

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2
Q

All Muscles Functions

A
  1. Excitable- React to stimuli
  2. Contract- Cells shorten
  3. Extensibility- Cells stretch
  4. Elastic- Recoil/ Bounce back
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3
Q

Skeletal Muscle

A
  • Attached to bone & involved in bone movement
  • Work together in groups
  • Striated Muscle
  • VOLUNTARY MUSCLE (controlled consciously)
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4
Q

Cardiac Muscle

A
  • Only found in Heart walls
  • Striated Muscle
  • INVOLUNTARY MUSCLE (controlled subconsciously)
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5
Q

Smooth Muscle

A
  • Found in walls of HALLOW organs
  • Weakest muscle tissue
  • Spindled Shape (NOT STRIATED)
  • INVOLUNTARY MUSCLE (controlled subconsciously)
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6
Q

How many named muscles in body?

A

700

make up approx HALF a person’s body weight

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7
Q

Muscle Tendons

A

Tough bands of connective tissue that have STRONG collagen fibers.

Collagen fibers firmly attach muscle to bone

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8
Q

Muscle Belly

A

Middle of muscle
Contracts when muscle moves

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9
Q

Perimysium

A

-Thin layer of connective tissue found in skeletal muscle
- Separates muscle into FASCICLES

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10
Q

Muscle Fascicle

A

Consists of bundles of muscle fibers (MYOCYTES)

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11
Q

Myocyte

A

SKELETAL MUSCLE FIBER!!!!

  • Long cylinder cell with multiple nuclei
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12
Q

Sarcolemma

A

Cell membrane of muscle fibers (myocyte)

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13
Q

Transverse Tubules (T-Tubules)

A

Tubes located in middle of skeletal and cardiac Muscle Fibers (myocytes & cardiomyocytes)

Allows electrical pulses and CALCIUM to move deeper into the cell

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14
Q

Myofibril

A

Made up of 1000s of sarcomeres

  • Contain THIN Actin filaments & THICK Myosin Filaments
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15
Q

Sarcomere

A

Contracting unit of muscle

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16
Q

Sacroplasm

A

Cytoplasm of Muscle Fiber

Contains smooth endoplasmic reticulum called SARCOPLASMIC RETICULUM

17
Q

Epimysium

A

Dense connective tissue that surrounds the entire skeletal muscle

18
Q

Cardiomyocyte

A

Cardiac Muscle cell contains one Nucleus

19
Q

Endomysium

A

Smaller connective tissue that surrounds the individual myocytes, cardiomyocytes & smooth Muscle cells

20
Q

Intercalated Disc

A

-Prevents cardiomyocytes from pulling apart

-Contains GAP JUNCTIONS to allow ions to flow from one cardiomyocyte to the other

21
Q

Smooth Muscle Found in

A
  • Small/ Large intestine
  • Stomach
  • Tracks of Reproductive System
  • Blood vessels
  • Skin
22
Q

Striated Muscle

A

Muscle tissue where contraction fibers are aligned in parallel bundles

Looks striped

23
Q

Fusiform Muscle

A

Spindle shaped muscle

Wide in middle tapered at both ends

24
Q

Origin

A

Tendons attached to bone that doesn’t move when contracting

25
Q

Insertion

A

Tendons attached to bone that move when contracting

ATI TEAS EXAM (6 decks)

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