List the hormones secreted by the following: (a) Hypothalamus (b) Pituitary (c) Thyroid (d) Parathyroid (e) Adrenal (f) Pancreas (g) Testis (h) Ovary (i) Thymus (j) Atrium (k) Kidney (l) G-I Tract (d) Transmission of a nerve impulse across a chemical synapse

(a) Hypothalamus:- Hormones secreted by the hypothalamus include Releasing Hormones. These hormones stimulate the secretions of the pituitary hormone. Examples of these hormones are:  Gonadotrophin-releasing hormone
1. Thyrotrophin-releasing hormone
2. Somatotropin-releasing hormone
3. Adrenocorticotrophin-releasing hormone
Inhibiting Hormones inhibit the secretions of the pituitary hormone. Examples of these hormones are:
1. Somatostatin
2. Growth-inhibiting hormone
3. Melanocyte-inhibiting hormone
(b) Pituitary: The pituitary gland has two components i.e., adenohypophysis and neurohypophysis. Hormones secreted by the adenohypophysis are:
1. Growth hormone (GH)
2. Prolactin
3. Thyroid-stimulating hormone (TSH)
4. Adrenocorticotrophic hormone (ACTH)
5. Luteinizing hormone (LH)
6. Follicle-stimulating hormone (FSH)
7. Melanocyte-stimulating hormone (MSH) Hormones secreted by the neurohypophysis are:
o Oxytocin
o Vasopressin
(c) Thyroid: The thyroid gland 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 inner adrenal medulla. Hormones of adrenal cortex include the following:
1. Mineralocorticoids: Secreted is known as aldosterone.
2. Glucocorticoids: secretes is cortisol.
Hormones of adrenal medulla are adrenaline and nor-adrenalin.
(f) Pancreas insulin and glucagon.
(g) Testis: testosterone.
(h) Ovary: estrogen and progesterone.
(i) Thymus: Hormones secreted by the thymus are thymosins.
(j) Atrium: The walls of the atrium secrete atrial natriuretic factor.
(k) Kidney: erythropoietin.
(l) G-I tract: Gastrin, secretin, cholecystokinin (CCK), and gastric inhibitory peptide (GIP).

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