Mineral balance Flashcards
Animals must maintain a proper balance in their cells and fluids in what three critical ions?
ca2+, K+, Na+
Bones are large body reservoirs of what?
Ca2+
What two ions don’t have reservoirs?
Na+ and K+
what Is a way to regulate concentrations Na+ and K+?
alternating rate of reabsorption from the urine
What 3 hormones regulate concentrations of Na+ and K+?
- ADH-a vaspressin
- aldestorone
- Atrial Natriuretic Peptide (ANP)
hypothalamatic osmoreceptors?
Detect increase in blood omolarity and respond with increase ADH secretion from posterior pituitary gland.
-inhibit aldestorone
-cause elimination of Na+
decrease Na+ reabsorbtion
mineralcorticoids
Steroid hormones that regulate salts and water balances;
Aldosterone
Aldosterone stimulates sodium retention;
ANP
Stimulate sodium loss. decreases Na+ absorbtion.
rickets
from deficiency in calcium, phosphorus or vitamin D. Affects weight bearing bones in the legs.
Osteoporosis
Caused by a disruption of the normal balance between bone formation and bone breakdown;
Bone serves what functions?
– support and protect the various organs of the body, – produce red and white blood cells,
– produce and store hormones, and
– store minerals.
metabolic functions of bones?
mineral strorage, Fat storage, acid-base balance, detoxification
osteoblast
“bone making”
osteoclast
“bone degrading” Digests the mineralized bone protein by secreting acid phosphatase and a collagenase.
