In the kidneys, parathyroid hormone acts to production of calcitriol and to excretion of calcium in urine.

in the kidneys, parathyroid hormones act to

increase production of calcitriol and to decrease excretion of calcium in urine

Explanation:

answer

crater lake was formed when mount mazama produced a large eruption and collapsed to form a caldera, which then filled with water forming a lake.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.