MUSCULAR

Most abundant tissue in the body

Muscle tissue

Muscle type responsible for voluntary movement

Skeletal muscle

Not a function of the muscular system

Production of blood cells

Muscle responsible for the heart beating

Cardiac muscle

Connective tissue sheath surrounding skeletal muscle

Epimysium

Basic functional unit of skeletal muscle

Sarcomere

Characteristic allowing skeletal muscle to return to resting length

Elasticity

Contraction causing heat production in the body

Skeletal muscle contraction

Muscle contraction involved in propelling food in the digestive tract

Smooth muscle

Location of intercalated disks

Cardiac muscle

Structure extending from one Z disk to another

Sarcomere

Molecule providing a calcium binding site on actin myofilaments

Troponin

Term for the most stationary end of a muscle

Origin

Muscle type under voluntary control

Skeletal muscle

Muscle type with gap junctions for action potential spread

Smooth muscle

Muscle type with striations less distinct than skeletal muscle

Cardiac muscle

Function of the retinaculum

Holding down tendons at the wrist and ankle

Muscle acting in opposition to an agonist

Antagonist

Muscle flexing the elbow

Biceps brachii

Condition characterized by painful, spastic muscle contractions

Cramps

Main symptom of fibromyalgia

Muscle pain

Result of an increase in myofibrils within muscle fibers

Muscle hypertrophy

Disorder with failure of muscles to relax after contraction

Myotonic muscular dystrophy

Muscle contraction not developing an oxygen debt

Smooth muscle contraction

Drugs used to treat myasthenia gravis

Anti-cholinesterase drugs

Inflammation of tendon attachment points

Tendinitis

Name for a broad, sheet-like tendon

Aponeurosis

"Striated" referring to muscle tissue

Muscle fibers have transverse bands

Muscle fibers organized into sarcomeres

Both cardiac and skeletal muscle

Muscle characteristic allowing response to a stimulus

Excitability

Ability of skeletal muscle to shorten with force

Contractility

Muscle responsible for peristalsis in the digestive tract

Smooth muscle

Muscle contraction leading to hypertrophy

Voluntary contraction

Connective tissue surrounding individual muscle fibers

Endomysium

Structure involved in muscle contraction composed of actin and myosin

Myofilament

Agonist in elbow extension

Triceps brachii

Decrease in muscle size due to decrease in myofilaments

Atrophy

Structure in cardiac muscle cells allowing action potential conduction

Intercalated disks

Characteristic not of smooth muscle cells

Striated

Muscle involved in communication like speaking and writing

Skeletal muscle

Connective tissue surrounding a muscle fascicle

Perimysium

Muscle type influenced by hormones like epinephrine

Both smooth and cardiac muscle

Condition involving chronic muscle pain syndrome

Fibromyalgia

Connective tissue holding down tendons at wrist and ankle

Retinaculum

Cytoplasm of a muscle fiber

Sarcoplasm

Muscle atrophy due to nerve damage or casting

Atrophy

Band of connective tissue holding down tendons at wrist and ankle

Retinaculum

Muscle fibers not organized into sarcomeres

Smooth muscle

Muscle with no tone due to severed nerve supply

Flaccid

Structure attached to the Z disk

Actin myofilaments

Muscle accomplishing a certain movement

Agonist

Muscle contraction under involuntary control

Both smooth and cardiac muscle

Main characteristic of myasthenia gravis

Muscle weakness

Muscle hypertrophy

The increase in muscle size due to an increase in the size of muscle cells.

Muscle atrophy

The decrease in muscle size due to a decrease in the size of muscle cells.

Destruction of acetylcholine receptors

A condition involving the chronic progressive autoimmune disease affecting acetylcholine receptors, known as myasthenia gravis.

Extensibility

The muscle characteristic that allows it to be stretched to its normal resting length and beyond.

Sarcomere

The smallest functional unit of skeletal muscle capable of contracting.

Skeletal muscle

The muscle type responsible for maintaining posture.

Myasthenia gravis

A condition involving chronic progressive autoimmune disease affecting acetylcholine receptors.

Cardiac muscle

The muscle type involved in heart contraction.

Z disk

The structure that forms an attachment site for actin myofilaments.

Insertion

The muscle attachment point that undergoes the greatest movement.

Intercalated disks

The characteristic of cardiac muscle that allows it to function as a unit.

Antagonist

Describes a muscle that acts in opposition to an agonist.

Perimysium

The connective tissue surrounding a muscle fascicle.

Cramps

Condition resulting from the buildup of lactic acid causing muscle pain.

Synergist

Describes a muscle that accomplishes the same movement as the agonist.

Smooth muscle

The muscle type with a single nucleus per cell and is under involuntary control.

Hypertrophy

The result of an increase in the number of myofibrils within muscle fibers.

Respiration

The primary role of the respiratory muscles.

Endomysium

The connective tissue that surrounds each skeletal muscle.

Excitability

Muscle characteristic that allows it to respond to a stimulus.