Parts of the Cell
What are the names of the two main myofilaments that stretch across the cell?
Actin & Myosin
Why do muscle cells have multiple nuclei?
Muscle cells are made of multiple Myoblast, which contain their own individual nucleus.
What are the three different types of muscle cells?
Smooth muscle cells, Cardiac muscle cells, and Skeletal muscle cells
Which filament, Actin or Myosin has two heads and is thicker?
Myosin
Where is Calcium released to initiate muscle movement?
Sarcoplasmic Reticulum
Where are each of the muscle cells, smooth, cardiac, and skeletal, located?
Smooth muscle cells: Internal organs
Cardiac muscle cells: Heart
Skeletal muscle cells: Limbs and around your bones
What role does tropomyosin play in the muscle cell?
Tropomyosin blocks Myosin's two heads from bonding with Actin, then moves when Calcium is present.
True or False: Sarcomeres are made up of the filaments actin, myosin, and tropomyosin.
True
True or False: Actin and Myosin are filaments that are parallel to each other and span the length of the muscle cell.
False: Actin and Myosin cross over each other and make a Z-like pattern across the cell.