Muscle 2

Origin is a muscle location attachment to the moveable bone.

• True

• False

Indirect muscle attachment includes tendons.

• True

• False

Which of the following is a red pigment found in muscles that binds to oxygen?

• glycosomes

• myoglobin

• hemoglobin

• mitochondria

Which of the following is part of the SR that runs perpendicular to the fiber?

• Transverse tubule

• T tubule

• triad

• terminal cisternae

The thin filament is made of the protein myosin.

• True

• False

Tropomyosin

• binds to calcium

• is part of the thick filament

• blocks actins active sites in a relaxed muscle

• stabilizes the thick filament

The A band is

• the length of a thick filament

• the length of a thin filament

• from z disc to z disc

• in the middle of the thing filament

The smallest contractile unit of muscle is

• H zone

• sarcomere

• I band

• A band

The myofibril is made up of

• thick filaments

• thin filaments

• myofilaments

• myofibrils

The _______ is for communication of the sarcolemma and the inside of the muscle fiber.

• Terminal cisternae

• myofibril

• glycosome

• myoglobin