Strength Training- Sports Med

What are muscles made up of?

• Bone cells

• Muscle fibers

• Blood cells

• Nerve cells

Into what units are muscle fibers split?

• Myofibrils

• Tendons

• Sarcomeres

• Fascicles

Refer to the diagram labeled 'A'. What does it represent?

• A tendon

• A sarcomere

• A muscle fiber (muscle cell)

• A fascicle

Refer to the diagram labeled 'C'. What does it represent?

• A muscle fiber

• A myofibril

• A tendon

• A fascicle

What is the functional unit of a myofibril that contracts using actin and myosin?

• Myofilament

• Sarcomere

• Myocyte

• Muscle fiber

What defines the boundaries of a sarcomere?

• M line to M line

• A band to A band

• Z line to Z line

• H zone to H zone

What are actin filaments commonly referred to as?

• Thick filaments

• Myosin filaments

• Thin filaments

• Tropomyosin filaments

What is the role of myosin in relation to actin filaments?

• Myosin detaches and remains stationary relative to actin.

• Myosin stabilizes the actin filaments without movement.

• Myosin attaches and "walks" along the actin filaments.

• Myosin prevents the actin filaments from interacting with each other.

What type of filament is myosin considered to be?

• Thin Filament

• Thick Filament

• Light Filament

• Dense Filament

What is the characteristic feature of the myosin head?

• It binds to tropomyosin.

• It has a globular shape that "walks" along the actin.

• It prevents actin from binding.

• It is static and does not move.