a&p muscular system vocabulary

Anaerobic

without oxygen

Complete tetanus

Stimuli are so frequent that relaxation does not occur

Cross-bridges

Forms when myosin heads bind to active sites

Glycolysis

Breaks glucose down to pyruvate in the cytoplasm

of the cell

Insertion

Skeletal Muscle System Name based on the end that moves

Isometric contraction

When the whole muscle length stays the same, the tension produced does not exceed the load

Isotonic contraction

When the length of the muscle changes, but the tension remains the same until relaxation

Lactic acid

What pyruvate is converted into

Motor unit

A single motor neuron and all the muscle fibers it innervates

Myofilaments

Thick and thin kinds of it make up myofibrils

Myoglobin

Protein that stores oxygen in the fibers

Neuromuscular junction

Where a motor neuron communicates with a skeletal muscle fiber

Origin

Skeletal Muscle System Name based on the end that stays stationary

Prime mover

Aka agonist; The muscle that is chiefly responsible for producing a movement

Sarcomere

Smallest functional unit of skeletal muscle fiber; formed by repeating myofilament arrangements

Sarcoplasmic reticulum

Specialized smooth endoplasmic reticulum

Synergist

A muscle that helps the prime mover

Tendon

Where the ends of all three layers of connective tissue come together and attach muscle to bone

Transverse tubule

Aka T tubule; contained in sarcolemma and allow for electrical stimuli to reach deep into each fiber