HORMONES

Adenohypophysis
1. Thyroid Stimulating Hormone (TSH) - Influence the normal circulatory level of
thyroxine
- Under the regulatory influence of
hypothalamus
2. Adrenocorticotropic Hormone
(ACTH)
3. Somatotropic Hormone or Growth
Hormone (STH)
4. Prolactin or Lactogenic Hormone
(LTH)
5. Follicle Stimulating Hormone (FSH)
6. Luteinizing Hormone or Interstitial
Cell Stimulating Hormone (LH or
ICSH)

Melanophore Stimulating Hormone (MSH) - Secreted by pars intermedia

- Influence chromatophore system
(physiological color response)
Neurohypophysis
1. Anti-diuretic Hormone (ADH) or - Important role in osmoregulation
Vasopressin
Thyroid Gland
1. Thyroxine - Iodinated protein
- Increases the rate of absorption of
monosaccharides
- Increases blood glucose level
- Increases rate of protein synthesis
- Influences growth (protein anabolic effect)
- Influences electrolyte an H2O metabolism
- Important role in thermoregulation
(calorigenesis)
- Has a role in molting
-
Triiodo-thyronine - Thyroxine precursors
Diiodo-thyronine
Parathyroid Gland
Parathormone - Maintains homeostasis of CaPO4 in the body
- Skeleton or bone is the main site of PTH action
- Hypercalcemic (increases blood Ca)
Thyroid Gland Thyrocalcitonin - Hypocalcemic factor (lowers blood Ca)
Pancreas
Insulin - Decreases glucose in blood
- Enhances glucose utilization by tissues
Glucagon - Increases glucose in the blood
- Enhances glycogenolysis in the liver
Adrenal Glands or
Suprarenals
Mineralocorticoids - Secreted by Zona Glomerulosa
- Compound is Aldosterone
Hormones Secreted -
by ADRENAL CORTEX Glucocorticoids - Secreted by Zona Fasciculata and Reticularis
- Compound is Cortisol
- Promote protein catabolism (breakdown)
 - Exert effect on electrolyte and water
metabolism
- Water diuresis (antagonistic to ADH)
Androgens - Compound is Testosterone
Tropic Factors that Adrenoglumerulotropin - From the pineal body
Affect Zona Angiotensin - From the kidney
Glomerulosa

Affects Zona Adrenocorticotropic Hormone (ACTH) - From adenohypophysis

Fasciculata and - Regulating effect on adrenal cortex
Reticularis

Aldosterone - Most effective adrenocortical steroid

Mineralocorticoids regulating electrolyte metabolism
11-Deoxy-Corticosterone

Corticosterone - Has a weak gluconeogenetic effect

- Slight mineralocorticoid activity
Cortisol - Essential for glycogenolysis
Glucocorticoids - Function under the influence of epinephrine
and glucagon
Cortisone
11-Dehydrocorticosterone

ADRENAL MEDULLA
Catecholamines - Hormones released in situations of STRESS
- Acts as an emergency “Flight or fight”
hormones

Catecholamines Epinephrine (Adrenaline) - Causes the increase in blood sugar

(hyperglycemic)
- Increase is due to glycogenolysis
- Increases blood flow
- Brings about circulatory adjustments
- EMERGENCY HORMONE
Norepinephrine - Differ in the nature and magnitude of actions
with epinephrine
- Aids in maintenance of blood pressure
- Function in vasoconstriction
- Mainly responsible for bodily adjustments
Dopamine
Enkephaline
Caudal
Neurosecretory
System of fishes
Urotensin - Hormone of CNSS
- Active principles in the urophysis

Somatic Pigmentation
(Crustacea)
Chromatophorotropin - Regulates response in somatic pigmentation
- From the eyestalk X organ complex (found in
all crustaceans)
Molting (Crustacea)
Molt Inhibiting Hormone (MHH) - Secreted by eyestalk
 - Inihibits molting
Molt Inducing Hormone (MIH) - Secreted in the Y-organ
- Induces molting
Ecdysone - Molting hormone of insects
- ~MIH
First 2 Crustacean Crustecdysone
hormones Identified Deoxycrustecdysone

Osmoregulation in
Crustacean
ADH
Hyperglycemic Hormone (HGH) - For blood sugar regulation
-
Reproduction in
Crustaceans
Male Sex Hormones - Produced by a pair of androgenic glands
- Influence normal testis development
- Influence spermatogenesis and secondary
sexual char.
-
Ovary Inhibiting Hormone (OIH) - Delays both enlargement of the ovaries
and deposition of yolk in the oocytes
Eyestalk Hormone - Prevents the last stages of oogenesis and
vitellogenesis
Neuroendocrine
Regulation in Insects

Juvenile Hormone (JH) or Neurotensin - Produced by Corpora Allata

- For molting
Ecdysone - Produced by ecdysial gland
3 Crustacean - Ecdysial gland is controlled by Corpora
Hormones Cardiaca
Ecdysiotropin or Molt Inducing Hormone - Stored in Corpora Cardiaca
(MIH) - Stimulates ecdysial gland to secrete
ecdysone
Molt Inhibiting Hormone (MHH) -

Reproduction Hormones

Male Sex Hormone

Androgens -Produced by interstitial cells of Leydig

Pituitary Gonadotropins FSH (Follicle Stimulating Hormone) - Increases the diameter of seminiferous
tubules
- Growth of Sertoli cells
LH (Luteinizing Hormone) - Secreted by adenohypophysis
- Stimulates the cells of Leydig that secrete
androgen that complete spermatogenesis
2 Main Testicular Testosterone
Androgens Androstenedione