Muscular System Test

A __ attaches a muscle to a bone.

The thick protein myofilaments in a myofibril are __.

The thin protein myofilaments in a myofibril are __.

The electrical current generated by the change in charge across the muscle cell membrane is called __ __.

A bundle of muscle fibers is a __.

The contractile unit of the muscle is the __.

The property of muscles that enable them to receive and respond to a stimulus is called __.

The attachment of the muscle end to the more movable bone is called __.

Which of the following statements about muscle tissue is NOT correct?

• an individual muscle cell is called a muscle fiber
• in muscle cells, the cytoplasm is called the sarcoplasm
• the sarcomere is the space between the thick and thin filaments
• the actin filaments are the ones that actually slide during contraction

Tags

NGSS.MS-LS1-3

NGSS.MS-LS1-2

Which of the following statements is NOT true of skeletal muscle activity?

• typically, muscles cross at least one joint
• the bulk of the muscle lies proximal to the joint crossed
• all muscles have at least two attachments
• during contraction, the muscle origin moves towards the insertion