Why is the concentration of calcium so high in the sarcoplasmic reticulum during rest?

Mr. wayne is a 38-year-old man with a significant history of elevated cholesterol levels. his father died at age 42 from a massive heart attack secondary to elevated cholesterol and triglycerides, and two of his older siblings are currently taking medications to lower their cholesterol levels. mr. wayne makes an appointment to discuss his risk for hypercholesterolemia. the nurse recognizes that mr. wayne is at risk for familial hypercholesterolemia because this is an autoomal dominant inherited condition. a. describe the pattern of autosomal dominant inheritance. b. mr. wayne asks what chance his children have of developing familial hypercholesterolemia. how should the nurse respond? c. explain the phenomenon of penetrance observed in autosomal dominant inheritance.

Which of the tollwing essential glands in the neck may be compromised during a thyroidectomy? a. thymus b. pituitary c. parotid d. parathyroid

Which of the following must be done to the lsovue to avoid a misdiagnosis of gallstones during a cholangiogram? a. do not inject the lsovue until the gallbladder is removed. b. mix 10 cc of saline with 20 cc of isovue. c. ensure that there are no air bubbles in the syringe before injection. d. keep the isovue chilled.