Question

which adrenal cortical hormone helps maintain blood pressure and blood volume?
multiple choice
antidiuretic hormone
cortisol
testosterone
dehydroepiandrosteone
aldosterone

Explanation:

Aldosterone is an adrenal cortical hormone. It acts on the kidneys' distal convoluted tubules and collecting ducts. It promotes sodium re - absorption and potassium excretion. Sodium re - absorption leads to water retention (due to osmosis). This water retention helps in maintaining blood volume. An increase in blood volume contributes to maintaining blood pressure.
Antidiuretic hormone (ADH) is not an adrenal cortical hormone (it is produced by the hypothalamus and released by the posterior pituitary). Cortisol is an adrenal cortical hormone but its main functions are related to stress response, metabolism (gluconeogenesis, protein catabolism), and immune suppression. Testosterone is a sex hormone (mainly produced in testes in males, and in small amounts in ovaries and adrenal cortex in females) and is not primarily involved in blood pressure and volume regulation. Dehydroepiandrosterone (DHEA) is an androgen precursor and has functions related to sexual development and metabolism, not blood pressure and volume.

Answer:

Aldosterone