Ch 7 Lab Anatomy 1 Lab Fau

Front 1

major type of muscle in the body is

Back 1

skeletal muscle

Front 2

main function of skeletal muscle

Back 2

to provide movement
(it is uninucleate, striated, and voluntary)

Front 3

level of organization for muscle (largest to smallest)

Back 3

muscle ---> fibers ---> myofibrils ---> myofilaments

Front 4

types of myofilaments and their function

Back 4

actin & myosin..slide past eachother for contraction

Front 5

muscle fiber

Back 5

Front 6

the sarcomere is

Back 6

the contractile unit of the muscle

Front 7

thin filaments are

Back 7

actin

Front 8

thick filaments are

Back 8

myosin

Front 9

I band has

Back 9

only actin

Front 10

A band has

Back 10

actin & myosin

Front 11

H zone has only

Back 11

myosin

Front 12

Z line has

Back 12

bisect I band, compose one sarcomere

Front 13

sarcolemma is

Back 13

the covering of each muscle fiber

Front 14

sarcoplasm is

Back 14

the cytoplasm of a muscle fiber

Front 15

sarcosome is

Back 15

the mitochondria of muscle tissue

Front 16

muscle fiber

Back 16

Front 17

sarcoplasmic reticulum is

Back 17

endoplasmic reticulum of muscle tissue

Front 18

endomysium is

Back 18

thin areolar connective tissue surrounding each individual fiber

Front 19

perimysium

Back 19

collagenic membrane surrounding bundle of fibers

Front 20

epimysium

Back 20

CT around entire muscle

Front 21

deep fascia is

Back 21

CT that binds muscles into functional groups

Front 22

tendons connect

Back 22

muscle to bone

(strong, rope like)

Front 23

aponeuroses conenects

Back 23

muscle to muscle or muscle to bone

(flat, sheet like)

Front 24

origin is

Back 24

fixed attachement of muscle

Front 25

insertion

Back 25

moveable attachment of muscle

Front 26

neuromuscular junctions are found where

Back 26

between nerve fibers and muscle cells

Front 27

synaptic cleft is

Back 27

the gap seperating neuron and muscle fiber

Front 28

Neuromuscular junction

Back 28

acetylcholine (ACh) leaves neuron --> goes to synaptic cleft --> and binds receptor on muscle sarcolemma --> ACh is then released --> sarcolemma channels then open --> K+ an Na+ flow across membrane --> ACTION POTENTIAL

Front 29

Agonists

Back 29

responsible for producing movement

Front 30

Antagonists

Back 30

oppose or reverse a movement, provides resistance

Front 31

synergists

Back 31

aid antagonists

Front 32

fixators

Back 32

specialized synergists, immobilize and allow you to pose

Front 33

Orbicularis occuli

Back 33

origin: frontal & maxillary bones

insertion: tissue of eyelid

Action: closes eye

Front 34

Orbicularis occuli location

Back 34

Front 35

Levator labii superioris

Back 35

origin:zygomatic bone & infraorbital margin of maxilla

insertion: skin & muscle of upper lip

Action: opens lip, raises& furrows upper lip

Front 36

Levator labii superioris location

Back 36

Front 37

zygomaticus

Back 37

origin:zygomatic

insertion: corners of mouth

action: smiling

Front 38

zygomaticus location

Back 38

Front 39

Risorius

Back 39

origin: Fascia of masseter muscle

insertion:skin at angle of mouth

actiion: draws corner of lip lateral

Front 40

Risorius location

Back 40

Front 41

Buccinator

Back 41

origin: molar region of maxilla&mandible

Insertion:orbicularis oris

action:draws corners of mouth

Front 42

Buccinator location

Back 42

Front 43

mentalis

Back 43

origin: madible below incisors

insertion: skin of chin

action: protrudes lower lip, wrinkles skin

Front 44

mentalis location

Back 44

Front 45

masseter

Back 45

origin: zygomatic arch

insertion:angle & ramus of mandible

action:elevate mandible

Front 46

masseter location

Back 46

Front 47

temporalis

Back 47

origin: temporal fossa

insertion: coronoid process of mandible

action: elevate & retract mandible

Front 48

temporalis location

Back 48