Muscles Flashcards Preview

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Flashcards in Muscles Deck (33):
1

Nuclei

Center of cell

2

Sarcoplasmic reticulum

Specialized smoothie endoplasmic reticulum

3

Sarcolemma

Thin filaments at both ends of the sarcomere-z line

4

Sarcomere

Thick and thin filament arrangements

5

Perimysium

Divides muscle into bundles called fascicles

6

Myofibril

Bundles of thick and thin Myofilaments

7

Fascicle

Bundle of muscle cells

8

Muscle cell

Very long and multinucleated, striped or striated in appearance

9

Muscle antagonist

A muscle that opposes another muscle

10

Agonist

Chiefly responsible for movement

11

Muscle fixator

Stabilizes the proximal joints during weight -bearing by distal joints

12

Muscle synergist

A muscle that resists undesired movements

13

Used in smiling

Zygomaticus

14

Used to suck in your cheeks

Buccinator

15

Used in winking

Orbicularis oculi

16

Used to form the horizontal frown crease in the forehead

Frontalis

17

The kissing muscle

Orbicularis oris

18

Prime mover of jaw closure

Masseter

19

Synergist muscle for jaw closure

Temporalis

20

Prime mover of head flexion; a two-headed muscle

Sternocleidomastoid

21

Used to rotate scapula

Trapezius

22

Hip flexor, deep in pelvis; a composite of two muscles

Iliopsoas

23

Used to extend hip when climbing stairs

Gluteus Maximus

24

Toe dancer's muscle; a two bellied muscle of the calf

Gastrocnemius

25

Inverts and dorsiflexes foot

Tibialis anterior

26

Muscle group that allows you to draw your legs to the midline of your body, as when standing at attention

Adductors

27

Muscle group that extends to the knee

Quadriceps

28

Muscle group that extends to the thigh and flexes the knee

Hamstrings

29

Smaller hip muscle commonly used as an injection site

Gluteus medius

30

Muscle group of the lateral leg; plantar flex and every the foot

Fibularis muscles

31

Strap-like muscle that is a weak thigh flexor; the "tailor's muscle"

Sartorius

32

Like the two-bellied muscle that lies over it, this muscle is a plantar flexor

Soleus

33

Myofilaments

Structures that help contract the muscle