The _______ filaments are pulled toward the center of the sarcomere during contraction.

Which epithelial tissue allows rapid diffusion and lines alveoli?

Which type of muscle surrounds most of the hollow organs?

A patient reports numbness and tingling in the fingers and hands. Imaging shows a herniated disc in the cervical spine. Explain how this structural issue is causing the symptoms.

How do smooth and cardiac muscle differ in function and structure?

A patient who works nights is experiencing bone pain and frequent fractures. Blood tests reveal low calcium levels and low vitamin D. Explain the likely physiological cause and suggest a treatment approach.

There is a kind of jellyfish that is extraordinarily hard to kill. It is smaller than a person’s fingernail and can live for hundreds of years. When it faces various kinds of dangers, whether being attacked or deprived of food, it shrinks by absorbing body parts like its tentacles. It turns into a small blob and can no longer swim. It then falls to the sea floor and stays there for a while. It reverts to an earlier stage in its life-cycle and starts over. It regrows body parts and eventually gets back to being a mature jellyfish. This process can be repeated over and over depending on the conditions it experiences. If it gets eaten by another animal, then it breaks down and dies.  Is it logically possible for one of these jellyfish to live forever? Describe how we can determine if something is logically possible. Is it physically possible for one of these jellyfish to live for 300 years? Explain how we can figure out if an action is physically possible. Be sure to fully address the requirements of each kind of possibility. Write 2-3 paragraphs.

A patient is recovering from a broken arm and has had their arm in a cast for six weeks. Upon removal of the cast, the biceps brachii appears visibly smaller, and the patient reports weakness when trying to lift objects. Explain what has likely happened to the muscle during immobilization and describe how physical therapy can help restore function.

The _______ is the part of a neuron that receives input.

A 68-year-old patient reports gradual vision loss and difficulty seeing at night. Ophthalmologic exam reveals increased intraocular pressure. What condition is most likely, and what part of the eye is being damaged?