Arrange the following statements in the proper sequence to describe the contraction mechanism in a skeletal muscle fiber.
a. depolarization occurs, and the action potential is generated.
b. the muscle fiber relaxes and lengthen.
c. the calcium ion concentrations at the myofilaments increase; the myofilaments slide past one another, and the cell shortens.
d. the action potential, carried deep into the cell by the t tubules, triggers the release of calcium ions from the sarcoplasmic reticulum.
e. the concentration of the calcium ions at the myofilaments decreases as they are actively transported into the sarcoplasmic reticulum.

Mr. will, a 67-year-old patient, is postoperative day 2 after a coronary artery bypass graft operation to revascularize his coronary arteries that were significantly blocked. he has a midline incision of his chest and a 7-inch incision on the inner aspect of his right thigh where a saphenous vein graft was harvested and used to vascularize the blocked coronary artery. the surgeon ordered oxycodone 5 mg every 4 hours prn for moderate pain and oxycodone 10 mg every 4 hours prn for severe pain. a. considering the patient's age, what medication administration considerations should the nurse incorporate into the pain management plan and why? b. what measures should the nurse provide the patient to prevent adverse effects of analgesic agents from occurring? c. what nonpharmacologic pain management methods should the nurse teach to mr. will to assist with pain management?