Muscle Test

Term
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Skeletal muscle
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Terms in this set (20)
Skeletal muscle
tissue that attaches to bones and allows for movement
Smooth muscle
tissue in internal organs ex. Digestive tract
Cardiac muscles
Tissues relating to the heart
What is the purpose of skeletal muscle
Movement, support our bodies systems, stability, and protection
Identify insertion and origin
The origin is where the muscle starts and the insertion is where the motion ends
Resting sarcomere
Myosin head in cocked position and troponin blocking active site of actin
Step 1 in muscle contraction
Ca ions enter sarcoplasm, bind to troponin, allowing active site to be exposed
Step 2 in a muscle conraction
myosin head attaches to actin active site forming a cross-bridge
Step 3 in a muscle contraction
Myosin head pivots using the energy stored from ATP, sliding the actin filament toward the center of the sarcomere
Step 4 in a muscle contraction
ATP breaks the cross-bridge attachment by binding with the myosin head
Step 5 in a muscle contractionATP is broken down, energy is used to cock myosin back in place. If Ca ions remain, the cycle repeats. If Ca ions are pumped out, troponin binds to active siteWhat are the functions of the skeletal systemsupport, movement, protection, and regulationdArk bandArea of overlap between thick and thin filaments,lIght bandCasing around the thin filaments on the outsides of the sarcomere.M - linemiddle of sarcomeresarcomereFrom z line to z lineThick filimentin the middle aka myosinThin filimentThink filaments aka actin runs in between thick filimentsZ lineDefines the lateral boundaries of the sarcomere and anchors thin titin, and nebulin filamentDescribe the use of energy by the muscular systemCreatine phosphate stores energy and then ADP is converted to ATP to be used by the body