Muscle Flashcards
What are the functions of the muscular system?
Movement Maintains Posture Stabilizes joint Generates Heat Controls Heart Muscle Dilation & Constriction of circulation
What are muscle cells called?
Muscle Fibres
What is the name of the 2 proteins found in a muscle fiber?
Myocin & Actin
What are the preffix’s for muscle?
Myo, Mys and Sarco
What is the name for the cell membrane in a muscle fibre?
Sarcolemma
What is the name change for the Cytoplasm in the muscle fiber?
Sarcoplasm
What is the name change for the Smooth ER in the muscle fiber?
Sarcoplasmic reticulum
What are the 3 types of muscle, and give an example of each?
Skeletal - biceps,
Smooth - uterus, circulatory blood vessels
Cardiac - heart
What is the function of skeletal muscle and what nerve pathway supplies them?
Movement and the Somatic nervous system -
Visually - Striated. Voluntary movement
What nerve system supplies the smooth muscle?
Parasympathetic and Sympathetic
Visually - Uni-striated. Involuntary movement
What nerve supply supplies Cardiac muscle?
Sympathetic and Parasympathetic
Visually Striated - Involuntary movement
What are the levels of organisation within a skeletal muscle?
Sarcomere - Myofibril - Muscle Fiber (cell) - Muscle Fiber bundle - Muscle
What is the name of the connective tissue that surrounds the whole muscle?
Epimyosium
What is the name of the CT that covers the Facicle (muscle fiber bundle)?
Perimysium
What is the name of the CT that covers the Muscle Fiber?
Endomysisum
What is the name of the area where the nerve axon meet the muscle fiber?
Muscle end plate.
What is teh name of the thin filaments?
Actin
What is the name of the thick filaments?
Myosin
What is the name given to the functional unit within a Skeletal muscle fiber?
Sarcomere
Why is calcium important in muscle contraction?
It binds to the troponin forcing it to change shape and the tropomyosin to move off binding sites
What does myosin need to move?
It need one molecule of ATP to move to bind and one molecule to release. ATP is converted to ADP and Pi
Where are the Ca ions kept?
In the Sarcoplasmic reticulum
What happens when an action potential is generated?
The AP travels do the T-Tubles opening the Sarcoplasmic reticulium allowing Ca ions into the Sarcoplasm which then bind to Troponin
What is the name of the nurotransmittter used by skeletal muscle?
Acetylcholine
