Which of the following is found on the outside of skeletal muscles? a). Myofibrilsb). Sheathc). Bundlesd). Sarcomere

Choose the best description of how myosin and actin are arranged within the two types of protein filaments in myofibrils. a.) Actin makes up the think filaments, and myosin makes up the thin filaments. b.) Myosin makes up the think filaments, and actin makes up the thin filaments. c.) Myosin and actin are randomly interspersed in the think filaments but are absent from the thin filaments. d.) Myosin and actin overlap with each other to make up both the think and thin filaments.

The greater the number of _________  involved in a motor unit, the ________ the degree of fine muscle control.   Question 9 options:   a)  muscle fibers............less   b)  ligand gated channels………….less   c)  layers of epimysium.........less   d)  muscle fibers............greater

Which of these events occurs during the team phase, just when a muscle has been stimulated? a) Ca2 + binds to troponin b) ATP is broken down into ADP c) active transport of Ca2 + into the sarcoplamate reticle d) sarcomeres are abbreviated