Presentation on theme: "Endocrinology... The Study of Hormones Today's Warm-up: Name one thing you think hormones are responsible for doing in your body."— Presentation transcript:
Endocrinology... The Study of Hormones Today's Warm-up: Name one thing you think hormones are responsible for doing in your body.
Let’s Start With Some Vocab… Hormone - substance produced by one gland or organ of the body that then travels through the bloodstream to affect other tissues, organs, etc. Gland – Specialized group of cells that releases hormones into the bloodstream. Organ - collection of tissues joined in structural unit to serve a common function.
How Hormonal Feedback Works 1)Based on feedback from the body, the first endocrine gland initiates release of a hormone. 2)The first hormone travels through the bloodstream to a second (target) gland. 3)The second gland releases a second hormone, which travels through the bloodstream to a target organ. 4)The target organ has a specific response to the hormone, and performs some biological function. 5)The hormone products from the second gland and the target organ travel through the bloodstream to provide feedback to the first and second endocrine glands. Makes Acts On Makes Acts On Makes Hormone #1 i.e. GHRH Hormone #2 i.e. GH Hormone #3 i.e. IGF-I Tissues i.e. growth of muscle and bone.
Hormones Make All of Our Bodily Functions Possible Growth Hormones Thyroid Hormones Sex Hormones Stress Hormones Pancreatic Hormones Pregnancy Hormones
Make a Chart to Keep Track… In one column, put the “Hormone Name” In the 2 nd column, put the “Hormone Source” In the 3 rd column, put the “Hormone Target” In the 4 th column, put the “Hormone Function”
Stress Hormones Key hormones: CRH (Corticotrophin Releasing Hormone) Source: Hypothalamus Target: Anterior Pituitary Gland Function: Causes the release of ACTH from the Anterior Pituitary gland ACTH (Adrenocorticotropin) Source: Anterior Pituitary gland Target: Adrenal Gland Function: Causes the release of Cortisol from the Adrenal gland Cortisol Source: Adrenal Gland Target: Systemic tissues Function: “Fight-type” responses
Thyroid Hormones TRH – Thyroid Releasing Hormone –Source: Hypothalamus –Target: Anterior Pituitary –Function:Stimulates the release of TSH from the Anterior Pituitary gland TSH – Thyroid Stimulating Hormone –Source: Anterior Pituitary Gland –Target: Thyroid Gland –Function: Stimulates the release of T3 and T4 from the Thyroid. T3 – Triiodothyronine (10%) –Source: Thyroid Gland –Target: Systemic Tissues –Function: Metabolism, heart rate, growth, brain development and function T4 – Thyroxine Hormone (90%) –Source: Thyroid Gland –Target: Systemic Tissues –Function: Metabolism, heart rate, growth, brain development and function Calcitonin –Source: Thyroid Gland –Target: Bone and kidneys –Function: Bone regeneration, urine production in the kidney