Muscular (part 1) Flashcards
The ability of muscle to return to its original length and shape after stretching is
Elasticity
The type of connective tissue that covers a fascicle 
Perimysium
The type of connective tissue that covers the entire muscle 
Epimysium
Muscle Fiber is also known as
Myocyte
Myofiber
Muscle cell
When a satellite cells is activated following muscle injury, it becomes a ____ before developing into a mature muscle cell 
Myoblast
What is the difference between a muscle fiber and a myofibril?
Muscle fiber is a muscle cell and it contains many myofibrils
The plasma membrane of a muscle cell
Sarcolemma
Stores calcium ions and releases them during muscular contraction 
Sarcoplasmic reticulum
The protein in muscle which stores oxygen and iron, similar to hemoglobin in blood 
Myoglobin
What is not found in thin filaments
Myosin
What is:
Troponin
Tropomyosin
Actin
Sarcomere
The region from Z disc to Z disc
Thick filaments are found in
A band & H zone
What shrinks and disappears as the muscle contracts? 
I band & H zone
The fewer the fibers per motor unit
The more precise the movement
What is the synaptic end bulb?
Nerve
The neurotransmitter active at the neuromuscular junction 
Acetylcholine
In relaxed muscle, ____ covers the ____-binding site found on ____
Tropomyosin
Myosin
Actin
The protein whose heads move during the power stroke of muscle contraction
Myosin
In muscle contraction, calcium ions move from the ____ to the ____
T tubules to the Sarcoplasmic reticulum
Muscle achieves maximum tension or force at 
An intermediate length
In terms of actin and myosin filaments, why is muscle weaker when it’s shorter than the optimal resting length?
Myosin bumps into Z discs, actin filaments overlap
In terms of actin and myosin filaments, why is muscle weaker when it’s longer than the optimal resting length?
Too few cross-bridges
Sustained muscle contraction with no twitches 
Fused tetanus
A muscle contraction involving increasing tension with constant length
Isometric
