Muscle and Muscle Tissue Flashcards
Muscle fibers include
Smooth and Skeletal Muscle Cells
Types of Myofilaments
Actin - Thin Filaments
Myosin - Thick Filaments
Prefixes used for Muscle
Myo
Mys-
Sacro-
Multinucleate
Syncytium which mean come together
what are the types of muscles
Skeletal
Cardiac
Smooth
Skeletal Muscles
- Longest cells
- Straited
- Multinucleate
- Voluntary
- Overall body mobility
- Adaptable force
- Rapid contraction, but tires easily
Cardiac
- Wall of heart
- Pumps blood
- Striated
- Involuntary
- Nervous control
Smooth
- Walls of hollow organs
- Moves substance through internal body passageways
- -Intestines, urine
- NO STRATIONS
- -Same Myofilament but arranges differently
- Involuntary
- Slow and sustained contractions
Functional Characteristics for all three types of muscle
- Excitability
- Contractility
- Extensibility
- Elasticity
Excitability
Responsiveness (neurotransmitter)
- Receive and respond to stimuli
- Anything acting on or within human body
Contractility
-Shorten Forcibly
Muscles only get shorter w/ force
Extensibility
Stretched or extended when relaxed
- Wont go back to original position
Elasticity
Recoil to resting length
Conductivity
Carry and electric portential ion-charged long a membrane
Muscle Functions
Produces movement
- Maintains posture
- Stabilizes joints
- Generating heat
Maintains posture
Stabilizes joints
Generating heat
Skeletal Muscle
Locomotion and manipulation
Movement
Skeletal Muscle
Movement of blood
Cardiac
Movement of substance
Smooth Muscle
Connective tissue shealths
Supports and reinforce Aid in recoil 1-Endomysium 2-Perimysium 3-Epimysium
Perimysium
Fascicles
around
Endomysium
Inside
Epimysium
Over
Attachment
attach to bones or other tissue
has to cross at least one joint
Cross joints
Origin
Insertion
Origin
No Movement
Insertion
Movement
Sacrolemma
- Plasma Membrane
- Forms indentations
- -(T-tubules)
Sarcoplasm
Stores oxygen
–Glycogen
Myofibrils
Tiny Cylinder
“Stick” of protein within the fibers Filled with myofilament
Alignement
Striation
- A band - Dark
- I Band - Light
Fibers
Stick of protein
Actin and myocin
Sacromere
-smallest contractile unit in skeletal
