Luna noticed that after her leg was in a cast for several weeks, the muscles seemed to have decreased in size. What term describes this condition?

Ethan experienced pain when he stepped on a nail in an old wooden board while walking his dog. When arriving home, he removes his shoe and sees a puncture wound in the bottom of his foot. Ethan understands that he is at risk for:

David is chewing a tough piece of steak and notices the muscle on the side of his jaw working hard to close his mouth. Which muscle covers the lateral surface of the mandible and is responsible for closing the jaw?

Mary has had muscle pain and fatigue for over three months. Her doctor prescribed treatment for her symptoms. Mary's diagnosis is most likely:

During the first basketball practice of the season, Jake begins experiencing muscle cramps and has to stop and rest for a few minutes. Jake understands that he is having these cramps due to a build-up of lactic acid in the muscles caused by:

Nora is studying how the body controls the passage of substances in different areas, such as the openings between the esophagus and stomach, as well as in the anus, urethra, and mouth. She learns that certain circular muscles are responsible for this control. What is this type of muscle called?

Joe flexes his biceps. What characteristic of muscles describes what is happening to Joe's biceps when he flexes them?

While helping Grace move a heavy box, she feels the muscle at the top of her shoulder working hard, just above and closer to her body than her triceps brachii. Which muscle is Grace using?

While helping Benjamin move a heavy box, you notice a large muscle on his back that is located just below the trapezius. Which muscle is this?

Preston was born with a genetic disorder that was undiagnosed until he was in preschool. His muscles began getting weaker and he lost his ability to walk at age 10. While his condition is incurable, treatments include: medications, assistive devices, and physical and respiratory therapy. What disorder does Preston have?

It is very cold while Sam is waiting at the bus stop. His mom tells him to run in place or jump up and down until the bus arrives. Which function of the muscular system is being used?

While running up a flight of stairs, James notices that his breathing becomes faster and deeper. Which muscle group is responsible for movement of the ribs in order to assist with respiration?

While helping Abigail move some heavy boxes, she notices the muscle on the posterior portion of her upper arm working hard. Which muscle is this?

Joe notices bulging in the lower quadrant of his abdomen after lifting weights. What is the most likely diagnosis for Joe?

Jenna's leg has been in a cast for four weeks due to a fracture. Her physician ordered physical therapy after the cast is removed to treat:

Abigail sits upright in her desk chair during class and walks down the hallway without hunching her shoulders. Which muscular system function is she demonstrating?

Priya participates in intense anaerobic exercises for a long time without taking enough breaks. What will this most likely cause?

While learning about different muscles in biology class, Mason wonders which muscle in the human body works only without conscious control. Which muscle only has an involuntary function?

During a soccer match, Henry suddenly felt a sharp pain in his thigh after sprinting, and later noticed swelling and bruising in the area. Which condition does Henry most likely have, involving tearing of muscle fibers and bleeding within the muscle belly?

Grace is learning about muscles in her anatomy class. She wants to know which muscle covers the shoulder. Can you help her choose the correct answer?

Cory stretches every night after running. What is the desired outcome for his muscles?

Samuel is learning about muscles in his anatomy class. His teacher asks him to identify which muscle is located on the posterior aspect of the lower leg. Which muscle should Samuel choose?