Endocrine System
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Which organ isn’t a part of endocrine gland but still is in endocrine system
Thalamus and hypothalamus
Hormone?
Low molecular weight chemically heterogeneous non nutrient substance that transport intercellularly and act as a signal molecule
Chemical classification of hormone?
Lipid soluble and water soluble
Lipid soluble hormone?
Steroid hormones and thyroid hormone
Water soluble hormones
Amine hormones, peptide and protein hormones
Steroid hormones derived from?
Cholesterol
Thyroid hormone derived from?
Addition of iodine with tyrosine
Amine hormones formed? Ex?
Formed by decarboxylation of amino acid. Norepinephrine, epinephrine and dopamine by modification of tyrosine
Peptide hormone and eg?
3 to 49 aa. Eg. Oxytocin and antidiuretic hormone
Protein hormones? Eg? Hormone with carbohydrates?
50 to 200aa. Eg. Human growth hormone and insuline Thyroid stimulating hormone is attached to carbohydrates
What connects the hypothalamus and pituitary gland
Infundibulum
Name the hormones hypothalamus secretes?
Thyrotropin releasing hormone Gonadotropin releasing hormone Growth hormone releasing hormone Corticotropin releasing hormone Prolactin inhibiting hormone
What inhibits growth hormone
Somatostatin
Two forms of somatostatin
Somatostatin 14 : hypothalamus and pancreas Somatostatin 28: intestine
What is anterior and posterior pituitary also called
Anterior: adenohypophysis Posterior: Neurohypophysis
Two portions of anterior pituitary
Pars distalis and pars intermedia
Growth hormone is also called
Somatotropin
How does growth hormone work?
Growth hormone promotes the movement of amino acids into the cell that turns into protein and produces growth. Indirectly they stimulate mitogen-like insulin-like growth factors that promote cell division.
What decreases the lactogenic effect
High level of progesterone
Prolactin gives negative feedback to?
GnRH
Tropic hormone
The hormones that stimulates other hormones to stimulate the release of other hormone
ADCT stimulates the release of?
Corticosteroid
What does FSH do?
Development of follicles, secretion of estrogen. Males: production of sperm
What does LH do?
Production of corpus luteum, secretion of progesterone Males: secretion testosterone