Elasticity is the ability of a muscle cell to increase in length.

An aponeurosis is a broad sheet of dense connective tissue that attaches a muscle to bone or bone to muscle

Skeletal muscle cells are typically multinucleate.

During an action potential positively charged sodium ions rush out of the cell.

Muscle fatigue is primarily the result of a lack of oxygen to the muscle cells.

The thick filaments in a myofibril consist of actin

A cramp occurs when a muscle contracts spasmodically without relaxing

Cardiac muscle does not require an external stimulus to begin the contraction cycle

In isotonic contraction the muscle does not shorten

When a muscle contracts the origin is pulled toward the insertion

The orbicularis oris is a muscle of mastication

The masseter muscle inserts on the mandible

The trapezius inserts on the acromion and spine of the scapula

The serratus anterior abducts the scapula

The pectoralis major inserts at the deltoid tubercle of the humerus

The supraspinatus acts to abduct the arm

The primary extensor of the arm is the triceps brachii

The brachialis muscle acts to flex the forearm

Triceps brachii inserts of the radial tuberosity of the radius

Anabolic steroids are synthetic versions of the male hormone testosterone

For the most part muscles on the anterior side of the forearm extend the wrist

The muscle on the lateral side of the leg is the tensor fascia lata.

The hamstrings act to extend the leg

The quadriceps insert on the patella and tibial tuberosity of the tibia

Each muscle cell is wrapped in dense connective tissue called

The I band is

The number of muscle fibers stimulated by one motor axon is

What chemical is released from the synaptic vesicles of a motor neuron

A slow and forcefully contracting muscle with no striations is

A muscle that produces single twitches that rapidly follow each other and progressively increase in height is called

Muscles which stabilize the origin of the prime mover are called

The frontalis muscle inserts on the

The orbicularis oculi acts to

The ___ muscle pulls the corners of the mouth backward when laughing

Which of the following muscles is NOT part of the rotator cuff?

The insertion of the supraspinatus is

The inserstion of the triceps brachii is

What muscle acts to extend the vertebral column?

What muscle originates on the iliac fossa and acts to flex the thigh?

What long, narrow muscle is also referred to as the "tailor's muscle"?

Which of the following muscles is NOT part of the quadriceps?

The posterior group of muscles of the lower leg act to

The gastrocnemius muscle inserts on the

twitch

insertion

protein that stores extra groups of phosphate

summation

The mechanical force of contraction is generated by

Which method of ATP formation efficiently builds ATP concentration with use of oxygen?

Muscle fatigue is at least partially due to

In a contracting muscle the Z lines come closer together

List the structures of a muscle from smallest to largest