Muscles Flashcards
What attaches skeletal muscles to the bone
Tendons
What do ligaments attach
Bone to bone
Why can bones act as levers
They are rigid
What are antagonistic pairs
Muscles that work together to move a bone
Agonist = contracts
Antagonist = relax
What are muscles made of
Muscle fibres
What is the cell membrane of muscle fibres called
Sarcolemma
What is the cytoplasm of muscle fibres called
Sarcoplasm
What are the folds in the sarcolemma called
Transvers (T) tubules
What is the function of the t tubules
Spread electrical impulses throughout sarcoplasm to reach all parts of the muscle fibre
What is the function of the sarcoplasm in reticulum
Stores and releases Ça ions
What is an adaption of muscle fibres
Lots of mitochondria for ATP
What does multinucleate mean
Lots of nuclei
What is the name of the thick myofilament
Myosin
What is the name of the thin myofilament
Actin
What is the dark band on a myofibril
Myosin and actin
A band
What is the light band on a myofibril
Actin only
I band
What is at the end of each sarcomere
Z line
What is the middle of a sarcomere
M line
What area only contains myosin
H zone