Calcium concentration is regulated by
A. hormones.
B. sodium and calcium concentration in plasma.
C. chloride and phosphate concentration in plasma.
D. the parasympathetic nervous system.
E. the sympathetic nervous system.
Answer: A. hormones
Calcium concentration is regulated by
A. hormones.
B. sodium and calcium concentration in plasma.
C. chloride and phosphate concentration in plasma.
D. the parasympathetic nervous system.
E. the sympathetic nervous system.
Answer: A. hormones
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