The hormone that increases the blood calcium level and decreases its excretion by kidneys is :

Options

A. Both calcitonin and parathormone
B. Calcitonin
C. Parathormone
D. Thyroxin

Answer

C

Explanation

Parathyroid gland secrete parathormone in low blood `Ca^(2+)` stimulate secretion, Thus, it increases blood `Ca^(2+)` and `Mg^(2+)` levels and decrease blood `HPO_(4)^(2-)` level. It increases bone reabsorption by osteoclast, increase `Ca^(2+)` reasbsorption and `HPO_(4)^(2-)` excretion by kidneys, promote formation of calcitirol that increase rate of absorption from gastrointestinal tract.