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The Muscular System

Vocabulary Terms and Definitions

What is another name for a muscle cell? MUSCLE FIBER
The more movable attachment to the bone is called what? INSERTION
The muscle attachment to the more stationary bone is called what? ORIGIN
What is the name of the protein that makes up the thin myofilaments? ACTIN
What is the name of the protein that makes up the thick myofilaments? MYOSIN
What is the basic functional unit of contraction in skeletal muscle? SARCOMERE
What are the three functions of the skeletal system? MOVEMENT, POSTURE, AND HEAT PRODUCTION
What molecule supplies energy for muscle contraction? ATP
What is the waste product produced when the muscle must must switch to an energy supplying process that does not require oxygen? LACTIC ACID
What is the name for a single motor neuron that innervates muscle? MOTOR UNIT
What is the name for the minimal level of stimulation required to cause a muscle to contract? THRESHOLD STIMULUS
What is the name for the type of muscle contraction that produces movement in a joint and allows the muscles to shorten? ISOTONIC
What is the name for the type of muscle contraction that doesn't produce movement and doesn't allow the muscle shorten but it does increase muscle tension? ISOMETRIC
What is the term for describing movement of a body part away from the midline of the body? ABDUCTION
What is the term used to describe the movement that is opposite of flexion? EXTENSION
What term describes the hand position when the body is in anatomical position? SUPINATION
Skeletal muscles can also be called? VOLUNTARY MUSCLES
Created by: brittinlarsen