Myology

Front 1

I. Gross Anatomy of Skeletal Muscle

Back 1

see following flashcards

Front 2

skeletal muscle is comprised of ______

Back 2

fascicles

Front 3

each fascicle is made up of _______

Back 3

muscle fiber

Front 4

2 synonyms for muscle fiber

Back 4

muscle cell or myofiber

Front 5

each skeletal muscle is what

Back 5

an organ

Front 6

attachments to the skeletal muscle is what type of tissue

Back 6

dense regular CT

Front 7

the dense regular CT attached to the skeletal muscle comes in what two forms?

Back 7

tendons

aponeuroses

Front 8

tendons are ____ like attachments and attach ____ to _____

Back 8

cable like attachments (muscle to bone)

Front 9

skeletal muscle also contains ____________, where all are the same type of tissue, the names only denote location

Back 9

connective tissue wrappings

Front 10

entire muscle (composed of _______) is surrounded by ______

Back 10

epimysium (epi=on top)

Front 11

each fascicle (group of muscle fibers) is surrounded by ______

Back 11

perimysium

Front 12

each muscle fiber wrapped in ______

Back 12

endomysium

Front 13

II. Microscopic Anatomy of Skeletal Muscle

Back 13

See following flashcards

Front 14

each muscle fiber/cell is composed of _____

Back 14

myofibrils

Front 15

each myofibril is composed of _____

Back 15

myofilaments

Front 16

two types of myofilaments

Back 16

thick and thin

Front 17

order of what skeletal muscle is composed of starting with skeletal muscle and getting smaller

Back 17

skeletal muscle--> fascicles--> muscle fiber --> myofibril --> myofilaments (thick or thing)

Front 18

thick myofilaments contain the protein ______

Back 18

myosin (larger diameter)

Front 19

thin myofilaments contain primarily the protein _____

Back 19

actin (smaller diameter)

Front 20

the muscle cell membrane is called _______

Back 20

sarcolemma

Front 21

the cytoplasm of the skeletal muscle cell is called the ______

Back 21

sarcoplasm (sarc="muscle")

Front 22

the skeletal muscle cell has cellular organelles like ____, _____, and ______

Back 22

lysosomes

ribosomes

sarcoplasmic reticulum

Front 23

sarcoplasmic reticulum are very _____ and _____. What is its function?

Back 23

smooth and branched (smooth ER)

stores calcium ions (Ca+) and releases them as needed for muscle contraction

Front 24

what is one thing only muscle cells have?

Back 24

transverse tubules (T-tubules)

Front 25

The function of T-tubules is to conduct a ________ rapidly to the _____ of the muscle cell; these act as a means of getting _____ into the cell and _____ out (_______)

Back 25

nerve impulse

interior

nutrients

waste

Front 26

____ is a contractile/functional unit of a myofibril

Back 26

sarcomere

Front 27

5 characteristics of the banding/striation pattern of a sarcomere when it is relaxed

Back 27

1. light bands

2. dark bands

3. Z-line (Z-disc)

4. H-zone

5. sarcomere

Front 28

light bands are called ___ bands and contain _____

Back 28

I-bands (LIGHT)

thin myofilaments only

Front 29

dark bands are called ___ bands and contain ____

Back 29

A-bands (DARK)

think and thin myofilaments

Front 30

Z-lines are a ____ line in the middle of a ___ band that demarks a _____; this is essentially where the ______ attach

Back 30

dark line

I-band

sarcomere

thin myofilaments

Front 31

H-zone is a ______, central region in the middle of a ____ band where only _____ are present

Back 31

lighter

A-band

thick myofilaments

Front 32

a sarcomere runs from ____ to ______ and _____ during contraction

it is known as the ______ unit

Back 32

Z-line to Z-line

shortens

functional contractile unit

Front 33

III. Contraction of Skeletal Muscle

Back 33

see following flashcards

Front 34

In the Sliding Filament Model of Contraction, muscle is stimulated by _____, thick and thin myofilaments _____ one another, and the length of each sarcomere _____ and the muscle _____

Back 34

nerve,

slide over

shortens

contracts

Front 35

do myofilaments change length during contraction?

Back 35

no