The parathyroid gland releases PTH (parathyroid hormone) into the bloodstream ins response to low blood calcium levels. PTH signals the bones to release stored calcium into the bloodstream. What type of feedback controls the regulation and secretion of PTH?
A. negative feedback loop
B. positive feedback loop
C. signal transduction loop
D. cell cycle loop
Answer:D
The parathyroid gland releases PTH (parathyroid hormone) into the bloodstream ins response to low blood calcium levels. PTH signals the bones to release stored calcium into the bloodstream. What type of feedback controls the regulation and secretion of PTH?
A. negative feedback loop B. positive feedback loop C. signal transduction loop D. cell cycle loop