Which ones influence the activity of kidneys?
a. Vasopressin
b. Thyroxine
c. Vasopressin and aldosterone
d. Gonadotropin

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Hint: Kidneys play an improved role in the human body as it removes waste products and excess of fluid which is not required through urine. Body’s salt, potassium and acid content is controlled by the kidneys.

Complete answer:
Vasopressin:- vasopressin is another name for antidiuretic hormone (ADH) it is a small peptide hormone which regulates the retention of water in the body. This hormone also occurs during a state of hypovolemia.

Thyroxine:- They are generally two hormones produced by the thyroid gland, which are called triiodothyronine (T3) and thyroxine (T4). This hormone is primarily responsible for metabolism. It also helps in regulating long bone growth.

Vasopressin and Aldosterone: - Vasopressin is the hormone which regulates water in our body. Nephrons are those functioning units of the kidneys which are made of tubules designed to reabsorb salt and water. Vasopressin and Aldosterone are those hormones which tell the kidney to put water back in the blood.

Gonadotropin: - Gonadotropin is hormones secreted by gonadotropin cells of the anterior pituitary of vertebrates. These hormones are present in the centre of a complex endocrine system. Its main function is to regulate normal growth, sexual development and reproductive functions. It acts on the gonads, and control gamete and sex hormone production.

The right answer to the question is C – vasopressin and Aldosterone.

Note: Vasopressin as well as Aldosterone are the two hormones which help the kidneys to function properly by putting water back correctly into the blood. Both hormones play an important role in the proper functioning of the kidney.