Exam 6: The Muscular System

Match the following: -Primary action of the rectus abdominis

Using Figure 6.1, match the following: -The myofilament composed of actin is indicated by ________.

Muscle development in babies occurs in a cephalic/caudal direction.

Which one of the following muscles is involved in abduction of the arm at the shoulder joint?

Match the following: -Muscle tissue that forms valves to regulate the passage of substances through internal body openings

Describe the events that occur from the time that a motor neuron releases acetylcholine at the neuromuscular junction until muscle cell contraction occurs.

The gap between the axon terminal of a motor neuron and the sarcolemma of a skeletal muscle cell is called the ________.

What condition results if muscles are not used, such as when immobilized in a cast for healing a broken bone?

Creatine phosphate (CP) functions within the muscle cells by ________.

The epimysium covering on the outside of the muscle can blend into cordlike ________ or sheetlike ________.

Which of these events must occur first to trigger the skeletal muscle to generate an action potential and contract?

Using Figure 6.1, match the following: -The I band within a skeletal muscle fiber is indicated by ________.

Which muscle is an antagonist to gastrocnemius?

What is the origin of the deltoid muscle?

The hamstring group is the prime mover of thigh ________ and knee ________.

Using Figure 6.1, match the following: -The A band within a skeletal muscle fiber is indicated by ________.

Using Figure 6.2, match the following: -The endomysium that wraps individual muscle fibers is indicated by ________.

Describe where and how dorsiflexion and plantar flexion occur.

The striations seen in skeletal muscle are actually alternating dark A and light I bands.

Match the following: -Muscle tissue composed of branching cells and intercalated discs