Calcium homeostasis A) involves the immediate adjustments required to maintain a constant free Ca²⁺ concentration on a minute-to-minute basis B) involves slowly responding with adjustments required to maintain a constant total amount of Ca²⁺ in the body C) is maintained primarily by the actions of parathyroid hormone D) involves the immediate adjustments required to maintain a constant free Ca²⁺ concentration on a minute-to-minute basis, and is maintained primarily by the actions of parathyroid hormone E) involves slowly responding with adjustments required to maintain a constant total amount of Ca²⁺ in the body, and is maintained primarily by the actions of parathyroid hormone

Question

Quizplus · Accepted Answer

Calcium homeostasis involves the immediate adjustments required to maintain a constant free Ca2+ concentration on a minute-to-minute basis, and this is maintained primarily by the actions of parathyroid hormone. Option A is only partially correct, as it only describes the immediate adjustments aspect of calcium homeostasis. Option B is incorrect, as maintaining a constant total amount of calcium in the body is not the primary focus of calcium homeostasis. Option C is incorrect, as while parathyroid hormone does play a significant role in calcium homeostasis, it is not the only regulator. Therefore, D is the most accurate answer.

Calcium Homeostasis