Muscular System Intro/Muscle Anatomy Flashcard - MAP

Front

What is inversion in relation to foot movement?

Back

Inversion is the movement of turning the foot so that the plantar surface (the bottom of the foot) faces medially (toward the midline of the body).

Front

What is extension in joint movement?

Back

Extension is the straightening of parts at a joint, which increases the angle between them.

Front

What is a 'thick' filament in muscle anatomy?

Back

Myosin is considered a 'thick' filament in muscle anatomy.

Front

What is a thin protein myofilament?

Back

Actin is a thin protein myofilament that plays a crucial role in muscle contraction.

Front

What does contractibility mean in muscle physiology?

Back

Contractibility refers to the ability of a muscle to shorten and produce tension at its ends.

Front

Define plantar flexion.

Back

Plantar flexion is the movement that decreases the angle between the foot and the leg, pointing the toes downward.

Front

What is dorsiflexion?

Back

Dorsiflexion is the movement that increases the angle between the foot and the leg, lifting the toes upward.

Front

Explain the role of acetylcholine in muscle contraction.

Back

Acetylcholine is a neurotransmitter that transmits signals from nerve cells to muscle cells, initiating muscle contraction.

Front

What is the function of myosin in muscle contraction?

Back

Myosin interacts with actin filaments to produce muscle contraction through a process called the sliding filament theory.

Front

What is elasticity in muscle tissue?

Back

Elasticity is the ability of muscle tissue to return to its original shape after being stretched or contracted.