Chapter 11 - muscular system Flashcards Preview

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Flashcards in Chapter 11 - muscular system Deck (35):
1

how do muscles produce movements?

by exerting force on tendons which pull on bones (1 bone is stationary and another moves)

2

origin

attachment of a muscle's tendon to the stationary bone

3

insertion

attachment of movable bone to tendon

4

agonist

prime mover
leader muscle

5

antagonist

stretch and yield to the effects of the prime mover

6

what is the arrangment of agonist and antagonist muscles?

usually on opposite sides of the bone depending on the movement

7

synergists

muscles used to prevent unwanted movements at intermediate joints

8

what do isotonic contractions result in?

movements

9

what are the 2 kinds of isotonic contractions?

1.Concentric isotonic
-muscle shortens while generating force (muscle tension > resistance)
2.Eccentric isotonic
-muscle lengthens (muscle tension

10

what so isometric contractions result in?

no movement
-equal muscle force and resistance
-supporting objects in a fixed position
-posture

11

Rectus

parallel to midline

12

Transverse

perpendicular to midline

13

Oblique

diagonal to the midline

14

Maximus

largest

15

minimus

smallest

16

longus

long

17

brevis

short

18

latissimus

wide

19

longissimus

longest

20

magnus

large

21

major

larger

22

minor

smaller

23

vastus

huge

24

deltoid

triangular

25

trapezius

trapezoid

26

serratus

saw-toothed

27

rhomboid

diamond

28

orbicularis

circular

29

pectinate

comb-like

30

piriformis

pear like

31

platys

flat

32

quadratus

square

33

gracilis

slender

34

Body Regions
-mouth, neck, arm, wrist, thumb, buttocks, thigh, great, front, back, towards head, towards feet, superficial and deep

Oris (mouth)
Cervicis (neck)
Brachial (arm)
Carpi (wrist)
Pollicis (thumb)
Gluteal (buttocks)
Femoris (thigh)
Hallucis (greattoe)
Anterior (towards the front)
Posterior/ Dorsal (towards the back)
Superior (close to head)
Inferior (close to the feet)
Superficialis (superficial)
Profundus (deep)

35

How are muscles of facial expression different than other muscles?

pull on skin rather than bone