Muscle Exam 2

Front

What is the primary function of the Pectoralis major muscle?

Back

The Pectoralis major muscle is primarily responsible for the flexion, adduction, and internal rotation of the humerus.

Front

What is the anatomical location of the Sternocleidomastoid muscle?

Back

The Sternocleidomastoid muscle is located in the neck, extending from the sternum and clavicle to the mastoid process of the temporal bone.

Front

What is the role of the Rectus femoris in the human body?

Back

The Rectus femoris is one of the quadriceps muscles and is responsible for extending the knee and flexing the hip.

Front

Which muscle type is responsible for involuntary movements in the walls of blood vessels?

Back

Smooth muscle is responsible for involuntary movements in the walls of blood vessels.

Front

What is the function of the Vastus medialis muscle?

Back

The Vastus medialis muscle helps in extending the knee and stabilizing the patella.

Front

What are the three types of muscle tissue in the human body?

Back

The three types of muscle tissue are skeletal muscle, cardiac muscle, and smooth muscle.

Front

What is the primary characteristic of skeletal muscle?

Back

Skeletal muscle is striated, voluntary, and attached to bones, allowing for movement.

Front

What distinguishes cardiac muscle from other muscle types?

Back

Cardiac muscle is striated, involuntary, and found only in the heart, with intercalated discs that facilitate synchronized contractions.

Front

What is the role of the diaphragm in respiration?

Back

The diaphragm is a dome-shaped muscle that contracts to increase thoracic cavity volume, facilitating inhalation.

Front

How does the structure of smooth muscle differ from skeletal muscle?

Back

Smooth muscle fibers are non-striated, spindle-shaped, and involuntary, while skeletal muscle fibers are striated and cylindrical.