LIFESCI 2 Lecture Notes - Lecture 15: G Protein–Coupled Receptor, Corticotropin-Releasing Hormone, Anterior Pituitary
Document Summary
Hormones chemical signals: diffuse into the blood and activate target cells far from site of release. Endocrine cells cells that secrete chemical signals into extracellular fluid: may exist as single cells i. e. in digestive tract. Target cells cells that have receptors for chemical signals. Paracrine signals: affect only target cells near site of release. Autocrine signals: affect cells that released the signal. Endocrine glands: secretory organs made of aggregations of endocrine cells that secrete into extracellular fluid blood. Exocrine glands: have ducts that carry signals to outside of body/to a body cavity, sweat gland, salivary gland, mammary gland, liver, pancreas, duodenum, secreted to intestines/duodenum anus. Includes: pineal thyroid gland, parathyroid glands, misregulation of calcium if removed, adrenal gland, stress effect, gonads (ovaries, testes, reproduction, hypothalamus, controls whole endocrine system, communicates w/ pituitary gland, anterior pituitary, posterior pituitary, thymus, pancreas, digestion. Neurohormones: neurotransmitters that diffuse into the blood.
