Which of the following is not a parathyroid gland mechanism to maintain adequate levels of blood calcium? a) activation of osteoclasts b)increase calcium ion reabsorption by the kidneys c) increase intestinal absorption of calcium ions d) all are methods used to maintain blood calcium

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called

Which of the following human activities resulted in the growth of the north american deer population?