A#129: A&P - Muscular Systems Quizizz flashcards

Front

• Skeletal Muscle

Back

Usually attached to bones

Responsible for voluntary movements

Also called striated muscle

Consists of muscle fibers, connective tissues, blood vessels, and nerves

Front

Smooth Muscle

Back

Usually not under voluntary control

Spindle shaped, has one nucleus, and is not striated

Found in the walls of hollow structures such as the stomach, blood vessels, and intestines

Front

Cardiac Muscle

Back

Found in the heart

Striated like skeletal muscle, although its cells are smaller

Usually not under the direct control of the nervous system

Front

Myofibrils (Muscle Fibers)

Back

Smaller structures within skeletal muscles.

Contain filaments

Front

Myosin

Back

A protein found in thick filaments

Front

Actin

Back

A protein found in thin filaments

Front

Sarcomeres

Back

Basic unit of a muscle

Front

Muscle Contraction

Back

When the thin filaments in the muscle fiber slide over the thick filaments.

Muscle shortens

Front

How Muscles and Bones Interact

Back

Skeletal muscles generate force and produce movement by contracting, or pulling on body parts.

Front

The total amount of force that a muscle can exert

Back

depends on the total number of individual muscle fibers that have been stimulated.