Musculoskeletal System Flashcards
Provide rapid commands to skeletal muscles and various other organs vs processing performed at the unconscious involuntary level
Pyramidal system vs extrapyramidal system
Bone to bone connectors ? Skeletal muscle to bone connectors ?
Ligaments: strengthen and support
Tendons: bend skeleton at movable joints
Component of the extrapyramidal system primarily in control of skeletal muscle tone. Located in the mesencephalon.
Red nucleus
Skeletal muscle. Filaments ? Contractile units? Endoplasmic reticulum? Cytoplasm? Cell membrane ?
Myofibrils Sarcomere Sarcoplasmic reticulum Sarcoplasm Sarcolemma
Channels ion flow throughout the muscle fibers and can also propagate an action potential
T system
Thick vs thin filaments ?
Myosin and actin molecules
I band vs H band vs A band ?
Thin filaments
Thick filaments
Overlap of both thick and thin filaments plus thick filaments
Calcium ions initiate contraction of the sarcomere by binding to?
Troponin C on the actin filaments
Rigor Mortis is due to an absence of?
ATP
5 major types of muscle contraction ?
Isotonic:muscle shortens, tension constant
Dynamic: change in length and muscle
Concentric: fibers shorten , tension increases
Eccentric: fibers lengthen , tension increases
Isometric : no change in length, tension increases
A state of partial contraction. Muscles never completely relaxed and maintain a partially contracted state at all times
Tonus
During strenuous activity it converts lactic acid in the liver to glucose for discharge into the bloodstream .
Cori cycle
Energy can be temporarily stored in a high energy compound during muscle contraction in?
Creatine phosphate
In muscle tissue , the oxygen supply in muscles by binding oxygen tightly
Myoglobin
When a muscle fiver is subjected to very frequent stimuli
A simple twitch is repeatedly generated
