Question

what does parathyroid hormone do?
multiple choice
it raises blood calcium levels.
it increases sodium retention.
it assists in t cell maturation.
it lowers blood sugar levels.
it increases red blood cell production.

Explanation:

Parathyroid hormone (PTH) is a hormone secreted by the parathyroid glands. Its main function is to regulate calcium levels in the blood. When blood calcium levels are low, PTH is released. It acts on bones (stimulating osteoclasts to break down bone and release calcium), the kidneys (increasing calcium re - absorption and phosphate excretion), and the intestines (enhancing calcium absorption through its effect on vitamin D activation).

• "It increases sodium retention" is more related to hormones like aldosterone.
• "It assists in T - cell maturation" is a function associated with the thymus and thymic hormones.
• "It lowers blood sugar levels" is the role of insulin.
• "It increases red blood cell production" is mainly regulated by erythropoietin.

Answer:

It raises blood calcium levels.