Muscles

Front 1

names of the connective tissue covering

Back 1

fascia - which is a dense connective tissue,it separates individual muscles from each other holds muscles in place, surrounds each muscle, it extend beyond the muscle to form a tendon which is continous with periosteum, fascia is a network woven throughout the body. (B) aponeuroses - broad fibrous sheets associated with muscles and tend to serve as a connection.

Front 2

name the three types of fascia

Back 2

1. deep fascia - which surrounds a muscle 2. subcutaneous fascia - lies beneath the skin 3. subserous fascia- is a connective tissue that covers organ and lines body cavities.

Front 3

name the compartments of skeletal muscle

Back 3

1. epimysium- closely surround a muscle 2. perimysium extend the epimsium deep into a muscle and sections the muscle it form bundles called fasicles which are bundles of skeletal muscle 3. endomysium surround each skeletal muscle fiber within a a fasicle

Front 4

characteristic of skeletal muscle fibers

Back 4

multinucleated, is a single skeletal muscle cell they unidifferentiate cells fuse during development

Front 5

what is a skeletal muscle fiber membrane called ? and what is the skeletal muscle fiber cytoplasma called

Back 5

1. a sarcolemma 2. sarcoplasma

Front 6

what are the characteristics of the sarcoplasma

Back 6

1. it is nuclei(many of these) 2. mitochondria (many of these if you are active) 3. contains filamentous proteins (for contractions) called myofibrils

Front 7

what are the characteristics of myofibrils

Back 7

filamentous protein components that create the contraction of a muscle, 2.thick filaments are called myosin 3. thin filaments are called actin proteins

Front 8

what are the filament light and dark band called? striations form a repeating patteren that is indicative of skeletal muscle functional unit we call?

Back 8

1. striations 2. sarcomeres

Front 9

true or false myofibrils are sarcomeres joined end to end to form a functional contractile unit

Back 9

true

Front 10

what are characteristics of i bands

Back 10

light bands composed of actin attached to the z line which appears in the center of the i bands

Front 11

what are a bands

Back 11

dark bands composed of myosin and overlapping actin

Front 12

what is the h zone

Back 12

region of consisting only of myosin or thick filaments

Front 13

what is the M line ? and what protein is is attached to myosin to the z line by what protein

Back 13

the region where myosin filament are held in place 2. tiltan

Front 14

each myosin molecule is composed of two twisted protin filament with globular partious or heads that project out from the strands what do we call these heads

Back 14

True the heads are called crossbridges

Front 15

describe thin filament actin

Back 15

it is a double helix strand of protein and a globular (ball like) protein with binding sites for the myosin head (cross bridges

Front 16

what are the name of the filament accesory proteins associated with actin

Back 16

1. Troponin a three suburst molecule that binds to actin 2. Tropomyosins - a rod shaped molecule that sit in the actin helix groove. it is held in place in the actin groove by the troponin molecule

Front 17

desribe the sarcoplasmic recticulum

Back 17

it has membraneous channel in the sarcoplasm it surround each myofirils and runs parallel to the myofibrils and it is analogous(corresponds ) to the ER of other cells

Front 18

Describe transverse tubules (or T TUBULES)

Back 18

has membraneous channels extends into the sarcoplasm continous with invaginations in the sarcolemma , they lie between two enlarged partitions of the sarcoplasm reticulum called cisternae

Front 19

together the cisternae and the t -tubules form what? this happens near where the actin and myosin filaments overlap

Back 19

triad

Front 20

what is the site where a axon and a muscle fiber meet

Back 20

Neuromuscular junction