Exam 7: Muscular System

What is the function of skeletal muscle tissue in addition to movement and posture?

Muscles that compress the abdominal wall include the external oblique and internal oblique.

What is the correct sequence for the following events of muscle contraction? 1)Calcium ions are released from the sarcoplasmic reticulum. 2)Power stroke pulls actin toward center of A band. 3)Impulse travels into the T-tubules. 4)Energized myosin heads attach to actin. 5)Calcium reacts with troponin and exposes binding sites on actin.

What is the term for the molecule within a muscle cell that replenishes the ATP used in contraction?

Short periods of strenuous exercise that require anaerobic mechanisms to replenish ATP result in an accumulation of pyruvic acid molecules,which may lead to muscle soreness.

The muscle that flexes the neck so the chin drops is the

A muscle that acts with others to produce a movement not possible by one muscle acting alone is called a(n)

A muscle fiber that receives a threshold stimulus

Oxygen for the production of ATP in muscle contraction is brought to the muscle by the

The muscle that allows you to stand on tiptoe is the

When stronger muscle contraction is needed to lift a heavy weight

A high energy compound that supplies the energy and phosphate to restore ATP from ADP in muscle is

Oxygen debt occurs as a result of the accumulation of

Actin and myosin shorten,or contract,when a muscle contracts.

Contraction that increases muscle tone but does not produce movement is called

What is the term for the type of muscle contraction in which a muscle shortens and movement is produced?

Skeletal muscle cells

Which statement is INCORRECT?

What is the term for the muscle that has an action that is opposite that of a prime mover?

Which of these functions pertain to muscle contraction? 1)produce movement 2)maintain posture 3)produce heat