To maintain calcium balance dietary intake should equal Ca

Last updated: 6/23/2023

To maintain calcium balance dietary intake should equal Ca loss in the urine and feces Dietary calcium Bone 99 Ca Calcitriol PTH prolactin Calcitonin PTH Calcitriol Cortisol Small intestine Ca ECF 0 1 Ca 2 5 mM second mor Some calcium is secreted into the small intestine Electrochemical Active gradient transport free Ca 0 001 mM Cells 0 9 Passive filtration PTH Calcitonin Calcium in feces Kidney Ca in urine Ca in kidney tubules KEY PTH parathyroid hormone Functions of Calcium in the Body Location Function Calcified matrix of bone and teeth Extracellular matrix Ca 99 Extracellular fluid Ca 0 1 Intracellular Ca 0 9 Which is NOT a physiological functions of calcium Neurotransmitter release at synapse Role in myocardial and smooth muscle contraction Cofactor in coagulation cascade Cement for tight junctions Influences excitability of neurons Muscle contraction Signal in second messenger pathways O plays role is maintaining of the resting membrane potential O affects the excitability of neurons O part of intercellular cement that holds cells together at tight junction O cofactor in the coagulation cascade