Exam 10: Muscle Tissue and Organization

A term that could be used to describe the changes that occur in muscle fibers as humans age would be

This sarcomere depicts relaxed muscle.The M line is noted by number

The structure responsible for attaching muscle to bone is a

The metabolic reactions within fast fibers derive much of their energy from aerobic respiration.

The functional contractile unit of a skeletal muscle fiber is called a _______________.

The agonist is the muscle that contracts to produce a desired movement.

In a sarcomere,which letter is associated with the thin dark line in the middle of an I band?

Which incorrectly describes what happens during skeletal muscle contraction?

The energy to drive the myosin movement during skeletal muscle contraction is provided by ATP.

The return of a contracted muscle fiber to its resting length is an active (energy requiring)process.

A motor unit consists of a: A single motor neuron B: Neuromuscular junctions C: Muscle fibers D: Several motor neurons E: A single muscle fiber

An increase in the size of a muscle fiber is called _________________.

The narrow space that separates the motor neuron and the skeletal muscle fiber in a neuromuscular junction is called the

Second-class levers are the most common in the human body.

Which fibers dominate many of the back and calf muscles that contract almost continually to maintain posture?

Which applies to synergist muscles? A: Assist the agonist B: Assist the antagonist C: May stabilize the point of origin D: May contribute to tension at the insertion site E: Most useful at the end of a movement

Which is the correct order of the connective tissue layers of a skeletal muscle,beginning with the most superficial? A: Endomysium B: Epimysium C: Perimysium

During skeletal muscle contraction,more force is created when more motor units are activated.

Which may occur as a result of muscle atrophy?

In muscles moving the appendicular skeleton,the more ____ attachment is the most mobile.