Anatomy & Physiology Chapter 6: The Muscular System

Result from stretching a muscle too far, causing some of the fibers to tear apart.

• tetanus
• muscle cramps
• pulled muscle
• skeletal muscle

Muscle fibers that break down ATP quickly, so they can contract quickly.

• fast-twitch fibers
• slow-twitch fibers
• twitch
• fasciitis

The principle that muscle cells always contract completely each time they are stimulated by their motor neuron, and that they do not contract at all if they are not stimulated by their motor neuron.

• motor neuron
• all-or-none principle
• motor unit
• isometric

A complete cycle of contraction and relaxation in a muscle cell.

• mysoin
• actin
• twitch
• origin

Any of the elongated contractile threads found in striated muscle cells.

• origin
• myofibrils
• myosin
• fasciitis

The end of a muscle that is attached to the bone that does not move during muscular contraction.

• actin
• origin
• myosin
• fatigue

Condition of feeling tired or weary.

• tetanus
• actin
• fatigue
• origin

The mechanism of muscle contraction.

• sarcoplasmic reticulum
• fasciitis
• sliding filament mechanism
• muscle cramps

Region where a motor neuron comes in close contact with a muscle cell.

• neurotransmitter
• muscular dystrophy
• muscle tension
• neuromuscular junction

The force exerted by a contracting muscle.

• muscle tension
• summation
• muscle cramps
• insertion