ch. 10 11 Flashcards Preview

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Flashcards in ch. 10 11 Deck (107)
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1

produce skeletal movement
maintain posture and body position
support soft tissues
guard entrance and exits
maintain body temp
store nutrients reserves

6 functions of the skeletal muscular system

2

how is skeletal muscle an organ

composition: skeletal muscle tissue, connective tissues, nerves, and blood vessels

3

skeletal muscle cells

muscle fiber

4

made of a bundle of muscle fibers (cells)

fascicles

5

surrounds entire muscle

epimysium

6

surrounds fascicles

perimysium

7

surrounds individual muscle fibers

endomysium

8

separates muscle from other tissues and organs

epimysium

9

also contains blood vessels and nerves

perimysium

10

contains capillaries and nerve fibers; both of which are in direct contact with each cell

endomysium

11

what is the epimysium also known as

fascia

12

continuation of collagen fibers of connective tissue coverings beyond end of muscle; cordlike

tendon

13

similar to tendon but is a broad sheet of CT that attaches a broad, flat muscle to another muscle or to several bones

aponeurosis

14

quite different than typical cells
enormous
cylindrical and is within endomysin
multinucleated

characteristics of skeletal muscle fibers

15

cell membrane

sarcolemma

16

cytoplasm

sarcoplasm

17

tubes- continuous w sarcolemma

transverse tubules

18

open to outside of muscle fiber

transverse tubules

19

tubular network that cover each myofibril

sarcoplasmic reticulum

20

lie between 2 portions of sarcoplasmic reticulum

transverse tubules

21

are enlarged portions near T tubules that store calcium

sarcoplasmic reticulum

22

contain extracelluar fluid and form passageways through the muscle fiber

transverse tubules

23

what ion does sarcoplasmic reticulum store

calcium

24

cylindrical structures inside muscle fibers; actively shorten and are responsible for muscle fiber contractions

myofibrils

25

2 kinds of protein filaments found in myofibrils

actin and myosin

26

thick filaments

myosin

27

thin filaments

actin

28

repeating functional units produced from the organized filaments in a myofibril

sarcomeres

29

arrangement of the filaments account for the banded appearance of myofibrils and thus muscle fibers

striations

30

has head and tail

myosin