The diagram shows the internal feedback mechanism that

Last updated: 5/17/2023

The diagram shows the internal feedback mechanism that maintains blood calcium Ca homeostasis Increases Ca reabsorption in intestines Blood Ca level rises Active vitamin D Stimulates Ca release from bones Stimulates Ca reabsorption in kidneys Parathyroid gland behind thyroid Homeostasis Blood Cat level about 10 mg 100 mL O The kidneys take up mare Ca and release vitamin D The bones release Ca The intestines increase reabsorption of Ca Releases PTH parathyroid hormone Stimulus Falling blood Ca level If a person has a blood calcium Ca level of 8 mg 100 mL of blood which of the following mechanisms does the body use to maintain blood calcium homeostasis