Muscle System Review 4

Tendons are oftern continuous with thr endosteum of bone tissue.
True False

There are more than 600 muscles in the body.
True False

The circulatory system is responsible for muscle tone.
True False

Muscle cells and muscle fibers are interchangeable terms.
True False

Groups of muscle cells held together by the perimysium are called fascia
True False

Fascia is another term for perimysium
True False

Myofibrils contain several sarcomeres lined up end to end
True False

Muscle cells have one nucleus and one mitochondrion
True False

The cell membrane of a muscle fiber is called the sarcoplamic reticulum
True False

At rest, troponin covers the active sites on the actin molecules
True False

Myosin filaments interact with actin filaments during muscle contraction
True False

When sarcomeres shorten, myofibrils also shorten
True False

Compound that supplies the energy for muscle contraction

Protein that has receptor sites for an ion causes it to change shape and pull another protein away from the receptor sites on the actin

Ion that is released by the sarcoplasmic reticulum

Protein that directly prevents the formaton of cross bridges in the sarcomere

Protein that has cross bridge heads that pull on thin fiber

By energizing these structures, chemical energy is converted to mechanical energy

Protein that has active sites for cross bridge heads