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Question : List the hormones secreted by the following : (a) Hypothalamus , (b) Pituitary , (c ) Throid, (d) Parathyroid (e ) Adrenal, (f) Pancreas, (g) Testis , (h) Ovary (i) Thymus, (j) Actrium , (k) Kidney, (I) G-I Tract (M) Transmissionof a nerve impulse across a chemical synapse

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Solution :(a) Hypothalamus
Hormones secreted by the hypothalamus include Releasing Hormones. These hormones stimulate the secretions of the pituitary hormone. Examples of these hormones are :
Gondotrophin-releasing hormone
Thyrotrophin-releasing hormone
Somatotropin-releasing hormone
Adrenocorticotrophin-releasing hormone
Inhibiting Hormones inhibits the secretions of the pituitary hormone. Examples of these hormones are :
(b) Pituitary : The pituitary gland ha two component i.e., adenophypophysis and neurohypophysis. Hormones secreated by the adenohypophysis are :
Growth hormone (GH)
Prolactin
Thyroid-stimulating hormone (TSH )
Adrenocorticotrophic hormone (ACTH)
Luteinzing hormone (LH)
Follicle-stimulating hormone (FSH)
Melanocyte-stimulating hormone (MSH) Hormones secreted by the neurohypophysis are :
Oxytocin
Vasopressin
(c) Thyroid : The thyroid glands secretes 3 hormones namely, thyroxin, triiodothyronin and calcitonin (t3 T4)
(d) PARATHYROID : Secretes a hormone known as parathyroid hormone.
(e ) Adrenal: The adrenal gland is divided into 2 parts, the outer adrenal cortex and the linner adenal medulla.
Hormones of adrenal cortex includethe following :
Mineralocorticoids: Secreted is known as aldosterone.
Glucocorticoids: secretes is cortisol.
Hormones of adrenalmedullla are adrenaline and nor-adrenalin.
(f) Pancreas insulin and glucagan .
(G) Testis: tetosterone,
(h) Ovary: estrogen and progresterone.
(i) Thymus: Hormones secreatedby the thymus and THYMOSINS,
(j) Atrium: The walls of the atrium secrete atrial natriuretic factor.
(k) Kidney: erythropoietin.
(I) G-I tract: Gartrin, secretion, chlecystokinin (CCK), and gastruc ihibitoary peptide (GIP).


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