Module 7 Flashcards
What are the three kinds of muscle tissue?
Skeletal
Cardiac
Smooth
What kind of muscle tissue are voluntary?
Skeletal
What kind of muscle tissues are involuntary?
Smooth and Cardiac
What are the special characteristics of muscle tissue?
Excitability
Contractility
Extensibility
Elasticity
What are the main functions of muscle tissue?
Posture
Generates Heat
Joint support
Movement
What are the anatomical parts of a muscle from biggest to smallest?
Muscle
Fascicle
Fiber
What are the connective tissue sheaths that surround the different layers of a muscle? From superficial to deep
Epimysium
Perimuysium
Endomysium
What surrounds the muscle fiber of a cell?
Sarcolemma
When a muscle is attached indirectly to a bone, what is the further connection?
a tendon or an aponeurosis
densely packed rod-like elements that are 80% of a cells volume that exhibit stratations
Myofibrils
What are myoglobin used for?
02 Storage
What glycosomes used for?
glycogen storage
What causes the striations of skeletal muscles and cardiac muscles ?
The dark A bands and the light I bands
What are the characteristics of skeletal muscle fibers?
Multiple nuclei, many mitochondria, glycosomes and myoglobin
What is the smallest and most functional unit of a muscle cell?
Sarcomere
What is the region between two Z discs called? And what is it made of?
Sarcomere
Actin and myosin
What is the function of a Z disc?
To anchor thing filaments and connect myofibrils to each other
Where is the M line and what is its function?
The middle of the H zone
Anchors thick filaments
What is the H zone and what is its function?
Light midregion where filaments do not over lap
Shrinks during contraction
What band is the thick filament also known as?
A band
What is the thin filament also known as?
I band
What are the binding sites for actin and ATP?
Thick filaments
Look like golf clubs
Have interwoven protein chains
What is the A band also known as and what is it made of?
Thin filament
Made of actin which is made of G actin which is the binding site for myosin heads
What are the regulatory proteins of actin?
Tropomyosin
Troponin