Muscular System Structure and Function Quiz

What are the components of a skeletal muscle?

• Bones, tendons, ligaments, and cartilage

• Muscle fibers, connective tissue, blood vessels, and nerves

• Fat cells, skin, hair, and nails

• Organs, blood cells, nerves, and glands

Describe the organization of a sarcomere in a skeletal muscle fiber.

• Actin filaments only with no myosin filaments

• Randomly arranged actin and myosin filaments

• Non-overlapping actin and myosin filaments

• Overlapping actin and myosin filaments organized in a repeating pattern

Explain the process of muscle contraction at the molecular level.

• The process of muscle contraction is initiated by the release of adrenaline

• Muscle contraction occurs due to the stretching of muscle fibers

• Sliding of actin and myosin filaments triggered by calcium ions and ATP hydrolysis

• Contraction is caused by the release of oxygen and carbon dioxide

What role do calcium ions play in muscle contraction?

• Calcium ions bind to troponin

• Calcium ions inhibit the release of troponin

• Calcium ions have no effect on muscle contraction

• Calcium ions break down troponin

What are the different types of muscle fibers and their characteristics?

• Cardio-twitch (Type C) and strength-twitch (Type S) fibers

• Long-twitch (Type L) and short-twitch (Type S) fibers

• Slow-twitch (Type I) and fast-twitch (Type II) fibers

• Smooth-twitch (Type III) and rough-twitch (Type IV) fibers

How do slow-twitch and fast-twitch muscle fibers differ in terms of function?

• Slow-twitch muscle fibers are used for quick, powerful movements

• Slow-twitch and fast-twitch muscle fibers have the same function

• Functionally, slow-twitch muscle fibers are used for endurance activities and are fatigue-resistant, while fast-twitch muscle fibers are used for quick, powerful movements and fatigue more quickly.

• Fast-twitch muscle fibers are fatigue-resistant

How do muscles work together to produce movement?

• By inflating and deflating like a balloon

• By remaining completely still

• By contracting and relaxing in a coordinated manner

• By expanding and contracting randomly

Explain the role of agonist and antagonist muscles in movement.

• Agonist muscles and antagonist muscles both work together to initiate movement.

• Agonist muscles work in opposition to control the movement, while antagonist muscles initiate movement.

• Agonist and antagonist muscles have the same role in movement.

• Agonist muscles initiate movement, while antagonist muscles work in opposition to control the movement.

What are some common muscle disorders and diseases?

• Muscular dystrophy, myasthenia gravis, fibromyalgia, muscular atrophy

• Alzheimer's disease, Parkinson's disease, Multiple sclerosis

• Hypertension, Asthma, Migraine

• Arthritis, Osteoporosis, Diabetes

Describe the symptoms and effects of muscular dystrophy.

• Enhanced muscle growth and development

• Increased energy and muscle strength

• Improved coordination and flexibility

• Progressive weakness and loss of muscle mass