*it is the smallest endocrine gland.
*it was termed by Andrew Vesalius.
*it has pin head like shape
*pituitary gland contains mainly two parts-
Adenohypophysis
Neurohypophysis.
*in female,it helps in ovulation.
*it helps in growth and development of Corpus Luteum and other endocrine gland.
*Corpus Luteum secretes progesterone(female sex hormone)
*it helps in growth and maintenance of uterus and implanted embryo, and also helps in growth of secondary sexual character. Viz- enlargement of breast, growth of pubical hair, deposition of fat in buttock.
LUTEOTROPHIC HORMONE / LTH / PROLACTIN HORMONE-
*it was termed by Andrew Vesalius.
*it has pin head like shape
Adenohypophysis
Neurohypophysis.
*in female,it helps in ovulation.
*it helps in growth and development of Corpus Luteum and other endocrine gland.
*Corpus Luteum secretes progesterone(female sex hormone)
*it helps in growth and maintenance of uterus and implanted embryo, and also helps in growth of secondary sexual character. Viz- enlargement of breast, growth of pubical hair, deposition of fat in buttock.
LUTEOTROPHIC HORMONE / LTH / PROLACTIN HORMONE-
- it is secreted from Pars distalis of Adenohypophysis.
- it has no role in male.
- in female it helps in growth and development of breast and synthesis of milk after four months of pregnancy.
MELANOCYTE STIMULATING HORMONE / MSH-
- it is secreted from pars intermedia of Adenohypophysis.
- it helps in synthesis of melanin pigment in other vertebrate except birds and mammals.
- in birds and mammal ,function is still unknown.
OXYTOCIN / PITOCIN-
- it is secreted from pars nervosa of neurohyposis.
- it is nonapeptide in structure.
- it is neurohormone.
- in male it has no role.
- in female it helps in contraction and relaxation of vagina during parturition
- it helps in ejection of milk so called as milk ejecting hormone.
- it is secreted from pars nervosa of neurohypophysis
- it incresace the permeability of wall of DCT to increase reabsorption of water.
- hyposecretion of ADH may cause Diabetes insipidus , which is insuline dependant diabetes.
*Hormone of hypothallamus control pituitary gland.
*hypothallamus secretes two types of factor i.e.- release factor and inhibitory factor.
*release factor stimulate release of particular hormone and inhibitory factor inhibit some particualr type of hormone as per requirement.
*release factor stimulate release of particular hormone and inhibitory factor inhibit some particualr type of hormone as per requirement.
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