Gce Model Questions Vol1 2023 Biology Question 11
Practice objective / multiple choice question 11 from the 2023 Gce Model Questions Vol1 Biology examination.
In the regulation of blood calcium, parathyroid hormone (PTH) raises plasma calcium by 0.4 mmol L(^{-1}) for each unit of hormone secreted, while calcitonin lowers plasma calcium by 0.3 mmol L(^{-1}) for each unit secreted. Under normal conditions the body secretes 1 unit of PTH and 1 unit of calcitonin, giving a net change of +0.1 mmol L(^{-1}). If a disease causes PTH secretion to increase to 1.5 units and calcitonin secretion to fall to 0.6 units, what is the resulting change in plasma calcium concentration compared with the normal state?
Answer Options
About This Question
This is Gce Model Questions Vol1 2023 Biology Question 11. It is one of the objective questions from the 2023 Gce Model Questions Vol1 Biology examination.
Difficulty level: Medium .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.