Muscle Identification and Muscle Contraction

Front

What is the latissimus dorsi?

Back

The latissimus dorsi is a large, flat muscle located on the back that helps in the movement of the shoulder joint, particularly in actions like pulling and lifting.

Front

What is the sartorius muscle?

Back

The sartorius is the longest muscle in the human body, running from the hip to the knee, and is involved in flexing, abducting, and laterally rotating the thigh.

Front

What are the thin filaments in muscle cells called?

Back

The thin filaments in muscle cells are called Actin.

Front

What is the gluteus medius?

Back

The gluteus medius is a muscle located on the outer surface of the pelvis, important for hip stabilization and abduction of the thigh.

Front

What is the vastus lateralis?

Back

The vastus lateralis is one of the four muscles of the quadriceps group, located on the outer side of the thigh, and is responsible for extending the knee.

Front

What is the role of myosin in muscle contraction?

Back

Myosin is a thick filament that interacts with actin to facilitate muscle contraction through the sliding filament theory.

Front

Define muscle contraction.

Back

Muscle contraction is the process by which muscle fibers generate tension and shorten, allowing for movement.

Front

What is the function of the external oblique muscle?

Back

The external oblique muscle helps in the rotation and lateral flexion of the trunk, as well as aiding in forced expiration.

Front

What is the function of actin in muscle cells?

Back

Actin provides the structural framework for muscle contraction and interacts with myosin to enable muscle movement.

Front

What is the role of the gracilis muscle?

Back

The gracilis is a long, thin muscle located in the inner thigh that assists in hip adduction and knee flexion.