Musculoskeletal System Flashcards
(15 cards)
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
