PSL201Y1 Chapter : PSL201 – Mar 4 – Endocrine 5 Calcium Balance.docx
Document Summary
Psl201 mar 4 endocrine 5: calcium balance. Calcium balance triggers exocytosis of various substances stimulates muscle contraction increases the contractility of the heart andblood vessels. Hypercalcemia (increase in plasma calcium) causes muscle weakness and atrophy, lethargy, behavioral changes, hypertension, constipation and nausea. Hypocalcemia (decrease in plasma calcium) causes numbness, muscle cramps, spasms, exaggerated reflexes, and hypotension regulated through the interaction of the kidneys, digestive tract, bone, and skin. Ca+ is transported both in blood plasma and by carriers: plasma ca+ is filtered by the glomerulus. Hormonal control of plasma calcium concentrations there are several hormones that regulate plasma calcium levels: Effects of 1,25-dihydroxycholecalciferol (1,25-(oh)2d3): steroid hormone that increases plasma calcium levels by stimulating calcium absorbtion from the digestive tract and calcium reabsorbtion in the dt synthesized from vitamin d3.