A student simulates muscle contraction in a model using the following order of events: 1. Calcium pumps of the sarcoplasmic reticulum open.
2. Tropomyosin moves.
3. Calcium ions bind to troponin.
4. Myosin heads bend to attach to actin filaments.
Based on the order of steps in the student's model, will the muscle successfully contract?

Critical thinking scenario: sally is providing patient education to an older patient, mrs. campo, who is having difficulty swallowing the large tablets needed for her medical condition. she tells you that two of the tablets have "deep lines" through the tablet and one has a very hard coat. mrs. campo wants to know if there is any way she can make swallowing the medicine easier. what instructions should sally give mrs. campo that will make her swallowing easier?