Flashcards in Muscle Notes Deck (25):
Moves an animal through its environment
Moves substances through an animal
What are the three basic types of muscles
Skeletal, Cardiac & Smooth
Which two types of muscle are striated
Skeletal & Cardiac
Where are some places smooth muscles are found?
Internal organs, blood vessels & glands
What is another name for smooth (or non-striated) muscle?
Define neurogenic and describe the muscle type that fits this bill
Neurogenic - contraction is initiated by nerve impulses. Eg: Skeletal muscle
Define myogenic and describe the muscle type that fits this bill
Myogenic - contraction arises due to impulses WITHIN the muscle itself (in the SA node), which then passes to all connected cells. Eg. Cardiac Muscle
Which muscle type uses both myogenic (connected via syncytium) and neurogenic control,
What makes a muscle to appear striated
Skeletal muscle cells are very ____ *describe size* with ___ nuclei
Skeletal muscles are under ____ control, while smooth and cardiac muscle are under ____ control.
What is another name for the gap junctions that connect cardiac muscle cells
What is the name of the network of cells that cardiac muscle cells form when they are joined by intercalated disks:
Which muscle types fatigue and which dont?
Skeletal muscle is fatigable while cardiac and smooth is not
Cardiac and Smooth muscle are ____-nucleated
Describe the shape of smooth muscle cells
Describe the shape of cardiac cells
Muscle cells aka
What are muscle fibers composed of
Myofibrils are made up of repeating units called
Z-line (aka Z-disk)
From Z-disk to Z-disk is one sarcomere. This is the union of two actin heads.
The entire length of myosin, including where there's actin-myosin overlap
Only actin here. Becomes shorter during contraction