Calcium Homeostasis Flashcards
What hormones are used for mineral resorption
Parathyroid hormone (PHT) and Calcitriol (Vitamin D)
These hormones increase calcium levels in the blood, and mineral resorption is the process of breaking down bone to increase calcium in the blood
What hormones are used for mineral Deposition
Calcitonin
Calcitonin decreases calcium levels in the blood and mineral deposition is the process of taking calcium from bone and depositing it into bone
If I needed more calcium in my blood, what would my body do?
Undergo mineral resorption.
Use parathyroid hormone and calcitriol (vitamin D) to to dissolve bone releasing calcium from bone and increase the calcium levels into the blood
When blood calcium levels are too high, what happens to calcitonin?
Calcitonin is secreted by C cells in the thyroid gland
Inhibit osteoclasts (that break bone to produce more calcium for blood)
Stimulate osteoblasts (take calcium from blood and put it into bone)
What is the process of moving calcium from the blood into bone
Mineral deposition
The process were calcium, phosphate, and other ions are taken from the blood and deposited into bone
What is the process of dissolving bone and releasing minerals into the blood?
Mineral resorption
What is the function of the thyroid gland in regards to calcium homeostasis?
The thyroid gland produces calcitonin (when blood calcium levels are too high) which STIMULATES osteoblasts and the deposition of calcium into bones
What is the function of the parathyroid clans and relation to calcium homeostasis?
Produces parathyroid hormone (PTH)
Aiding in mineral Resorption by STIMULATING osteoclasts to break down bone to INCREASE blood calcium levels
When blood calcium is low, which hormones are our secreted?
Parathyroid hormone from parathyroid gland
calcitriol from vitamin d produced by skin
What effects does calcitonin have?
Lowers blood calcium
Inhibits osteoclasts
Produced by C cells in Thyroid glad when blood calcium is to high
What effects does calcitriol have?
Raises blood calcium level
Produced by epidermal cells
Increases calcium resorption from skeleton
Increases calcium absorption by small intestines
Increases calcium reabsorption in kidneys
What effect does parathyroid hormone have?
Raise blood calcium
Stimulate osteoclasts
Secreted by parathyroid glands when blood calcium is low
What is Hypocalcemia?
Deficient calcium in blood
causes overly excitable nervous system + tetany (muscle spasms)
What are the causes of Hypocalcemia
Vitamin D deficiency, Diarrhea, thyroid tumors, underactive parathyroid glands
What increases the risk of Hypocalcemia?
Pregnancy + lactation = higher risk
