Musculoskeletal System A&P

What is a sprain?

• A tear in a muscle from overuse

• A painful muscle spasm

• A tear in a ligament

• Inflammation of a tendon

What is atrophy?

• A decrease in muscle size due to a decrease in muscle tissue

• A painful muscle spasm

• A tear in a muscle from overuse

• Inflammation of a tendon

What are shin splints?

• A tear in a ligament

• Pain along the anterior, lower leg commonly occurring after physical activity

• Inflammation of a tendon

• A decrease in muscle size

Which condition is characterized by a painful muscle spasm?

• Cramp

• Sprain

• Atrophy

• Tendinitis

Which of the following disorders is hereditary?

• Tendinitis

• Muscular dystrophy

• Shin splints

• Muscular atrophy

What is the function of acetylcholine in the neuromuscular junction?

• Acetylcholine stimulates muscle contraction at the neuromuscular junction.
• Acetylcholine inhibits muscle relaxation at the neuromuscular junction.
• Acetylcholine transports oxygen to muscle cells.
• Acetylcholine acts as a neurotransmitter in the brain

What is an isometric contraction?

• An isometric contraction occurs only during relaxation of the muscle.
• An isometric contraction is a type of aerobic exercise that increases muscle size.
• An isometric contraction is a muscle contraction where the muscle length remains constant while generating force.
• An isometric contraction involves a change in muscle length while generating force.

What type of muscle fiber primarily uses anaerobic metabolism?

• Smooth muscle fibers
• Cardiac muscle fibers
• Slow twitch muscle fibers

• Fast twitch muscle fibers

Which is an example of smooth muscle tissue?

• The intercostal muscles

• The biceps

• Intestinal walls
• The muscle of the heart

This product of anaerobic metabolism causes muscle soreness

• lactic acid
• carbon dioxide
• creatine

• pyruvate