9. Musculatory System I Flashcards Preview

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Flashcards in 9. Musculatory System I Deck (183)
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1

Formative immature cells of muscles; present in fetal stage; func: mitosis

Myoblasts

2

Non striated
Involuntary
Can divide

Smooth muscle

3

Spindle shaped muscle tissue

Smooth muscle

4

Only mature muscle tissue that can divide

Smooth muscle

5

Striated
Voluntary
Multinucleated
Hypertrophy only cannot multiply

Skeletal muscle

6

Location of nucleus of skeletal muscle

Lateral surface

7

Striated
Involuntary
Cannot multiply; hypertrophy only

Cardiac muscle

8

What type of muscle cell or tissue is the HEART

Cardiac muscle

9

What connects cardiac muscle cells together

Intercalated discs

10

Cellular junctions in cardiac muscles

Desmosomes
Gap junctions

11

Outermost ct layer that covers MUSCLE BELLY

Epimysium

12

Middle layer covers FASCICLES

Perimysium

13

Innermost; covers MUSCLE CELLS OR FIBERS

Endomysium

14

Connects muscle to bone

Tendon

15

Connects bone to bone

Ligaments

16

Group of muscle fibers covered by perimysium

Fascicle

17

Cell membrane or plasma membrane of muscles made up of phospholipid bilayer

Sarcolemma

18

Structures that makes up the muscle cell or fiber

Myofibrils

19

Structures that makes up myofibrils

Myofilaments

20

2 kinds of myofilaments

Thin filaments
Thick filaments

21

Thin filaments is composed of what protein

Actin

22

Thick filaments are composed of what protein

Myosin

23

Shape of myosin

Golf club

24

Functional or contractile unit of muscle; from Z disc to another Z disc

Sarcomere

25

Separates one sarcomere to another
Attachment for thin filaments
Passes in the middle of the I band

Z discs

26

Contains thick but no thin filaments (MYOSIN ONLY)

H zone

27

Passes in the middle of H zone

M line

28

Aka dArk band

A band

29

Aka lIght band

I band

30

Blocks the myosin binding sites in actin (relax muscle)

Tropomyosin