A&P Ch4

The strong tendon that joins the muscles in the posterior leg to the calcaneus

A cellular protein found in myofilaments that is active in muscular contractions, cellular movement and maintenance of cell shape

A change in electrical potential that occurs when a cell or tissue has been activated by a stimulus

The short muscle that adducts the thigh

The long muscle that adducts the hip

The area within the pelvis that contains the anus

Muscles working in oppoistion to each other

A condition caised by damage, either through trauma or infection, to the facial nerve, resulting in an inability to move the facial muscles on the affected side

the large portion of muscle between the origin and the insertion

Located in the posterior compartment of the leg, it flexes and laterally rotates the knee and extends the hip

An intracelluar protein that calcuim binds to, resulting in muscle contraction

Muscle that is found only in the heart, providing the contractions needed to propel the blood through the circulator system

An anatomic space within the body that is enclosed by fascia

Accumulation of blood or fluid in an anatomic compartment, typically following trauma, resulting in compression of blood vessels and tissue damage secondary to ischemia and, if not recongnized and promptly treated, death of muscle and loss of limb

A flattened dome-shaped muscle that is the main muscle of breathing, located at the base of the thorax, separating the thorax from the abdomen

The delicate connective tissue surrounding individual muscular fibers

Groups of muscles that cause extension.

Fluid outside of the cells

Movement of the eyes in various directions

A loater of fibrous connective tissue outside the epimysium that seperates individual muscles

Groups of muscles that cause flexion when contracted

Conduction areas between cells (eg, in visceral smooth muscle) that interconnect individual muscle groups

An iron-containing pigment found in red blood cells, carries 97% of oxygen

the end of a muscle that is attached to the bone that is undergoing the greatest movement

Branching fibers in cardiac muscle that allow action potentials to pass from cell to cell

The ability of a muscle to generate it's own electrical activity

An organic acid that can lower the intercellular pH

Specialized nerve cells that deliver an impulse to muscle cells, causing them to contract

one of the two types of smooth muscle, it is formed into sheets of muscle (as in the walls of blood vessels), small bundles of muscles (as in the iris of the eye), or single cells(as in the capsule of the spleen).

Fibers that contract causing movement; three types of muscle are present in the body; skeletal, smooth, and cardiac muscle

A bundle of skeletal muscle cells bound together by connective tissue and forming one of the constituent elements of a muscle

Threadlike structures that extend from one end of the muscle fiber to the other

The individual protein filaments, conposed of either actin or myosin, that make up a myofibril

An iron-containing red pigment, similar to hemoglobin that is found in muscle fibers

A fibrous globulin of muscle that reacts with actin to form actomyosin

The junction between a motor netron and a muscle fiber. One type of a synapse

A chemical substance that transmits nerve impulses across a synapse

The attachment of a muscle to the more stationary of two bones

A temporary osygen deficiency in muscles after strenuous exercise, characterized by heavy breathing until the muscles have been suppiles with sufficient oxygen

a deep muscle of the medial compartment that adducts and internally rotates the shoulder

A deep muscle of the medial compartment that adducts, flexes, and internally rotates the thigh

The largest muscle of the chest wall, it adducts and inernally rotates the shoulder

The connective tissue sheath that surrounds a muscle and forms sheaths for the bundles of muscle fibers

The area below the coccygeus and levator animuscles, which forms the floor of the pelvis

the proximal end of the nerve fiber in the neuromuscular junction

The distal end of the nerve fiber in the neuromusclar junction

The muscle in a group of muscles that has the major role in movement

Muscle contained in the anterior compartment of the thigh that extends the knee when contracted

the linear muscle of the midline of the abdomen

A special group of four mscles that forms a cap over the proximal humerus and ties the humerus to the scapula. It controls rotation at the shoulder joint

The thin transparent sheath surrounfing a striated muscle fiber

Any of the repeating strucural units of striated muscle fibrils

A system of membranes that transport materials in muscle cells

The longest muscle in the human body, it is located in the anterior compartment of the thigh and flexes both the hip and knee when it contracts

Muscles of respiration that elecate the first two ribs during inspiration

Striated muscles that are under direct volitional control of the brain; also called voluntary muscles

The movement of the myofilaments during contration of the muscle

Muscle that carries out much of the automatic work of the body, such as moving food through the digestive tract and dilating and constricting the pupils of the eye; also called involuntary muscle

the space between nerves and muscles in the neuromuscular junction across which a nerve impulse is transmitted by a neurotransmitter

Muscles that work together to accomplish a particular movement

Tough, ropelike cords of fibours tissue that attach muscles to bones

A test used to evaluate the integrity of the achilles tendon for possible rupture

The region within the pelvis that contains the structures of the urogenital system

Sheets of muscle found in the digestive, reprodutive, and urinary tracts

A layman's term for traumatic soft-tissue injurt to the structures of the neck, associated with sudden flexation or extention

Supination of the forearm against tesistance to evaluate whether a patient has bicipital tendinitis