Question

Life saving hormone are secreted by
a. Pituitary gland
b. Pineal gland
c. Adrenal gland
d. Thyroid gland

Answer 1

Hormones are chemical messengers that are secreted directly into the blood, and then carried to the target organs of the body to conduct their essential functions. Various types of hormones are produced and secreted in the body that is crucial for various body functions.

Complete answer:
The adrenal gland which is also known as supra-renal gland, secretes various hormones that are life saving. The adrenal gland secretes following hormones:

Aldosterone: Aldosterone released by the adrenal cortex is a life-saving hormone as it serves to retain sodium and water to maintain and balance a sufficient blood volume for circulation. Thus, it maintains the osmolarity and volume body fluid. Malfunctioning of adrenal gland leads to decrease in the sodium and chloride concentrations in the body which may result in shock and sudden death.

Cortisol: Cortisol is also a steroid hormone that conserves fluid balance and blood pressure under stress conditions. Cortisol also maintains blood pressure and the immune function. Thus, Cortisol is also essential for life.

Epinephrine: It is also a stress hormone. Epinephrine is also known as flight or fight hormone that allows for an immediate reaction to either escape or counter it in a stressful situation.

Norepinephrine: Along with adrenaline, nor epinephrine elevates the heart rate and also regulates the blood volume output of the heart. It also helps in breakdown of fat and increases blood sugar levels to provide required energy to the body.

Hence, the correct answer is option (C).

Note: The pituitary gland controls the secretion of other endocrine glands. Pineal gland secretes melatonin that regulates the body's biological clock and daily rhythms. Thyroid hormones regulate the calcium levels and basal metabolic rate of the body.