Anatomy and Physiology Muscle Unit

Front

Myofibrils are made of:

Back

myofilaments

Front

Muscles are held in place and covered by:

Back

fascia

Front

Functional unit of a muscle:

Back

sarcomere

Front

Thin filaments in muscle fibers are called:

Back

actin

Front

Substance crossing the neuromuscular junction to communicate with muscle fibers:

Back

acetylcholine

Front

Energy source for muscle contractions:

Back

ATP

Front

A band in a myofibril is an area of:

Back

thick filaments

Front

A sarcomere is the section of fiber between:

Back

Z lines

Front

Tendons connect:

Back

muscles to bones

Front

Connective tissue surrounding individual fibers:

Back

endomysium