Question

Discuss the role of pituitary gland and the hormone that it secretes and what organ or tissue is affected. Discuss the difference between estrogen and progesterone and it's effect in women.Discuss the difference between estrogen and progesterone and it's effect in women.

Answer 1

The pituitary gland is a part of our endocrine system. Its main function is to secrete hormones into the bloodstream. These hormones can affect other organs and glands, especially your:

• thyroid
• reproductive organs
• adrenal glands

The pituitary gland is sometimes called the master gland because it’s involved in so many processes.

Pituitary gland anatomy and function

The pituitary gland is small and oval-shaped. It’s located behind your nose, near the underside of your brain. It’s attached to the hypothalamus by a stalklike structure.

The Pituitary & Hypothalamus Cerebrum Hypothalamus Pituitary Cerebellum Brain Stem

The hypothalamus is a small area of your brain. It’s very important in controlling the balance of your bodily functions. It controls the release of hormones from the pituitary gland.

The pituitary gland can be divided into two different parts: the anterior and posterior lobes.

Anterior lobe

The anterior lobe of your pituitary gland is made up of several different types of cells that produce and release different types of hormones, including:

• Growth hormone. Growth hormone regulates growth and physical development. It can stimulate growth in almost all of your tissues. Its primary targets are bones and muscles.
• Thyroid-stimulating hormone. This hormone activates your thyroid to release thyroid hormones. Your thyroid gland and the hormones it produces are crucial for metabolism.
• Adrenocorticotropic hormone. This hormone stimulates your adrenal glands to produce cortisol and other hormones.
• Follicle-stimulating hormone. Follicle-stimulating hormone is involved with estrogen secretion and the growth of egg cells in women. It’s also important for sperm cell production in men.
• Luteinizing hormone. Luteinizing hormone is involved in the production of estrogen in women and testosterone in men.
• Prolactin. Prolactin helps women who are breastfeeding produce milk.
• Endorphins. Endorphins have pain-relieving properties and are thought to be connected to the “pleasure centers” of the brain.
• Enkephalins. Enkephalins are closely related to endorphins and have similar pain-relieving effects.
• Beta-melanocyte-stimulating hormone. This hormone helps to stimulate increased pigmentation of your skin in response to exposure to ultraviolet radiation.

Posterior lobe

The posterior lobe of the pituitary gland also secretes hormones. These hormones are usually produced in your hypothalamus and stored in the posterior lobe until they’re released.

Hormones stored in the posterior lobe include:

• Vasopressin. This is also called antidiuretic hormone. It helps your body conserve water and prevent dehydration.
• Oxytocin. This hormone stimulates the release of breast milk. It also stimulates contractions of the uterus during labor.

DIFFERENCE BETWEEN ESTROGEN AND PROGESTERON:

FUNCTIONS OF ESTROGEN AND PROGESTERONE IN HUMAN BODY:

BASIS FOR COMPARISON	ESTROGEN	PROGESTERONE
Meaning	The type of female hormone which triggers the development and in the function of the secondary sexual characters like mammary glands, uterus, pubic, armpit hairs, etc.	The type of female hormone which induced the changes during the pregnancy like the formation of the placenta, attachment of the embryo to the uterine wall, etc.
Produced by	The graffian follicle in the ovary.	Corpus luteum in the ovary.
Regulated by	Follicle Stimulating Hormone (FSH).	Luteinizing Hormone (LH).
Released by	Estrogen hormone is released by ovaries before the ovulation.	Progesterone is released by the ovaries after the ovulation.
	It is also produced during pregnancy by the placenta.	This hormone is also produced during pregnancy by the placenta.
Function	Estrogen enhances the enlargement of the breast and the uterus at the time of pregnancy.	Progesterone triggers the growth of the mammary gland and function in the contraction of the uterus.
	It also helps in the formation and in the regulation of secondary sexual characteristics.	It is also involved in the maintenance of the uterus and endometrium.