Biology - Chemical Coordination and Integration Question with Solution | TestHub

Oxytocin stimulates vigorous contractions of the uterus at the time of childbirth, hence it is known as the birth hormone.

Aldosterone acts mainly at the renal tubules and stimulates the reabsorption of $N{a}^{+}$ and water, hence it is known as the salt retaining hormone.

Progesterone supports pregnancy and is therefore known as the pregnancy hormone.

Calcitonin (Thyrocalcitonin) regulates blood calcium levels by decreasing them, making it a hypocalcaemic hormone. Parathyroid hormone (PTH) increases blood calcium levels and is the hypercalcaemic hormone. Thus, the pair Hypercalcaemic hormone - Calcitonin is mismatched.

Answer: Hypercalcaemic hormone - Calcitonin