A muscle that assists the muscle that is primarily responsible for a given action is a(n)

Supination and pronation refer to up and down movements of the foot at the ankle.

Characteristics of _____ include: enzymatic pathway that breaks down glucose into pyruvic acid, anaerobic, produces a net of 2 ATP, important when the lack of oxygen limits the rate of ATP production, primary of source of ATP during peak periods of activity

Curling into the “fetal position” ________ the intervertebral joints.

The functional unit of a skeletal muscle fiber is the

A ________ is a rigid structure that moves on a fixed point.

Bonus What is the main function of the quadriceps femoris group:

When a muscle fiber contracts, the I bands diminish in size, the H zones disappear, and the A bands move closer together but do not diminish in length.

A common injury to the ankle occurs by excessive turning of the sole inward, called

_____ – cylindrical structure that consists of myofilaments; actively shorten; when they contract the entire muscle cell shortens