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Adrenocorticotropin Hormone (ACTH) including Cortisol

The hypo­thal­a­mus releases the fol­low­ing Releas­ing Hor­mones that stim­u­late the release of dif­fer­ent hor­mones from the adenohypophysis: Cor­ti­cotropin Releas­ing Hor­mone (C.R.H. causes the release of ACTH) Thy­rotropin Releas­ing Hor­mone (T.R.H. causes the release of Thy­roid Stim­u­lat­ing Hor­mone aka Thyrotropin) Gonadotropin Releas­ing Hor­mone (GnRH releases LH and FSH.) Growth Hor­mone R.H. & Growth Hormone I.H. Pro­lactin R.H. & Pro­lactin […]

Stress and Cortisol

On the right is a lab form for testing hormone levels in the body and it’s all done by RIA. The very first hormone listed is cortisol. Notice it shows the cortisol levels are different between night (PM) and day (AM). It’s higher when you wake up, generally in the morning (unless you work graveyard […]

Thyroid Stimulating Hormone (Thyrotropin)

The hypo­thal­a­mus releases the fol­low­ing Releas­ing Hor­mones that stim­u­late the release of dif­fer­ent hor­mones from the adenohypophysis: Cor­ti­cotropin Releas­ing Hor­mone (C.R.H. causes the release of ACTH) Thy­rotropin Releas­ing Hor­mone (T.R.H. causes the release of Thy­roid Stim­u­lat­ing Hor­mone aka Thyrotropin) Gonadotropin Releas­ing Hor­mone (GnRH releases LH and FSH.) Growth Hor­mone R.H. & Growth Hormone I.H. Pro­lactin R.H. & Pro­lactin […]

Hormones secreted by the Anterior Pituitary Gland (Adenohypophysis)

Now, we just said that the Releasing Hormones from the hypothalamus cause the release of hormones in the adenohypophysis. These are the releasing hormones coming from the hypothalamus: Corticotropin Releasing Hormone (CRH causes the release of ACTH) Thyrotropin Releasing Hormone (TRH causes the release of TSH;Thyroid Stimulating Hormone;Thyrotropin) Gonadotropin Releasing Hormone (GnRH releases LH and […]

Endocrinology of the Hypothalamus and Pituitary Gland

The hypothalamus, located just below the Thalamus and the 3rd ventricle, is controlling everything involved with the pituitary gland. The hypothalamus is linked to the pituitary gland by both nerve fiber tracts and a profuse network of capillaries called the hypothalamic-pituitary portal system (aka hypophyseal portal system). Look at the pathway of the blood in […]

Synaptic Transmission by Somatic Motorneurons

We go over how synapses work for activating motor neurons and the neuromuscular junction in detail. Then with that information, we see how it relates to pharmacology and clinical applications.