Muscle cell flashcard

Front

A muscle fiber is wrapped in a ___________.

Back

Endomysium: The innermost layer of connective tissue that surrounds individual muscle fibers.

Front

A fascicle is wrapped in a _____________.

Back

Perimysium: The connective tissue that surrounds a group of muscle fibers, forming a fascicle.

Front

Which is the largest? Muscle fiber, Myofilament, Myofibril, Myosin

Back

Muscle fiber: The largest structural unit of muscle tissue, consisting of many myofibrils.

Front

Which is the largest? Fascicle, Muscle fiber, Muscle, Myofilament

Back

Muscle: The largest unit, made up of many fascicles.

Front

A muscle is wrapped in a _____________.

Back

Epimysium: The outermost layer of connective tissue that surrounds the entire muscle.

Front

What is the function of myofilaments?

Back

Myofilaments are the contractile proteins (actin and myosin) that enable muscle contraction.

Front

Define myofibril.

Back

Myofibril: A long, thread-like structure within a muscle fiber, composed of repeating units called sarcomeres.

Front

What is the role of the sarcomere?

Back

Sarcomere: The basic contractile unit of muscle tissue, responsible for muscle contraction.

Front

What is the difference between skeletal and smooth muscle?

Back

Skeletal muscle is striated and under voluntary control, while smooth muscle is non-striated and involuntary.

Front

What is the function of the sarcoplasmic reticulum?

Back

Sarcoplasmic reticulum: A specialized endoplasmic reticulum in muscle cells that stores calcium ions, essential for muscle contraction.