Muscular System

Open Ended

What do you think is involved in this assessment?

Multiple Choice

Which of the following best describes the significance of the Gowers Maneuver in a neurological assessment?

• It helps identify muscle weakness often seen in neuromuscular disorders.

• It is used to test cognitive abilities in children.

• It is a method for measuring lung capacity.

• It is a routine part of all pediatric checkups.

Multiple Choice

Which connective tissue layer surrounds individual muscle fibers?

• Epimysium

• Perimysium

• Endomysium

• Myofibrils

Multiple Select

Which of the following are components of a muscle fiber?

• Sarcolemma

• Mitochondrion

• Sarcoplasm

• Tendon

Open Ended

Explain the relationship between the sarcolemma, sarcoplasm, and myofibrils in a muscle fiber.

Multiple Choice

Which band in a myofibril is formed by thick (myosin) filaments?

• A band

• I band

• Z disc

• H zone

Open Ended

Describe the structural organization of a sarcomere and its relationship to the bands seen in muscle fibers.

Multiple Choice

Which of the following correctly represents the hierarchy of muscle structure from largest to smallest?

• Muscle > Fascicles > Myofibrils > Myofilaments > Actin/Myosin

• Muscle > Myofibrils > Fascicles > Myofilaments > Actin/Myosin

• Muscle > Myofilaments > Fascicles > Myofibrils > Actin/Myosin

• Muscle > Fascicles > Myofilaments > Myofibrils > Actin/Myosin

Open Ended

Explain how the structure of a muscle fiber relates to its function in muscle contraction.

Multiple Choice

What is the main function of the sarcoplasmic reticulum in muscle cells?

• Store and release calcium ions

• Transmit nerve impulses

• Provide structural support

• Generate ATP

Multiple Select

Which of the following are components of a muscle fiber as shown in the diagram?

• Sarcolemma

• Myofibrils

• Myofilaments

• T tubule

Multiple Select

Which of the following bands or zones are present in a sarcomere?

• I band

• A band

• H zone

• Z line

Open Ended

What is the role of the sarcoplasmic reticulum in muscle cells?

Multiple Choice

Which structure is responsible for the contraction of skeletal muscle at the microscopic level?

• Muscle fascicle

• Sarcomere

• Tendon

• Bone

Open Ended

Explain the significance of elevated creatine kinase (CK) levels in a patient’s blood test.

Multiple Select

Which of the following are considered cardiac biomarkers that can indicate muscle damage?

• Troponin

• Myoglobin

• Creatine Kinase

• Hemoglobin

Open Ended

Based on the muscle biopsy images, what differences can be observed between healthy muscle tissue and Tom’s muscle tissue?

Multiple Choice

Which of the following best describes the Gowers Maneuver observed in Tom?

• Using hands to push on legs to stand up

• Standing up without using hands

• Jumping to a standing position

• Rolling to the side before standing