Understanding Muscle Anatomy and Function

Front

What is a motor unit?

Back

A motor unit consists of one neuron and all the muscle cells (fibers) that it controls.

Front

Which connective tissue surrounds the entire muscle?

Back

The connective tissue that surrounds the entire muscle is called Epimysium.

Front

What is the primary role of myosin in muscle contraction?

Back

The primary role of myosin in muscle contraction is to pull on actin to cause contraction.

Front

Which term refers to a 'flesh-measure' in muscle anatomy?

Back

The term that refers to a 'flesh-measure' in muscle anatomy is Sarcomere.

Front

What best describes the sarcolemma?

Back

The sarcolemma is a muscle cell membrane.

Front

What is the function of actin in muscle contraction?

Back

Actin serves as the thin filament that myosin pulls on during muscle contraction.

Front

What is the role of the endomysium?

Back

The endomysium is the connective tissue that surrounds individual muscle fibers.

Front

What is a fascicle in muscle anatomy?

Back

A fascicle is a bundle of muscle fibers surrounded by perimysium.

Front

What is the function of the perimysium?

Back

The perimysium surrounds and groups muscle fibers into fascicles.

Front

What is the difference between voluntary and involuntary muscles?

Back

Voluntary muscles are controlled consciously (e.g., skeletal muscles), while involuntary muscles operate automatically (e.g., cardiac and smooth muscles).