ANSC 2251 Lecture 8: Horse Science Lecture 8 (Endocrine System)
Document Summary
Secreted directly into circulatory system, travel to a target organ or tissue to influence (inhibit or stimulate) function. Hormones don"t originate but are stored here. Released by hemorrhaging, trauma, pain, anxiety some drugs. Increases water absorption and prevents horse from losing fluids. Causes release of milk into mammary glands. Acts on follicle to increase growth rate. Causes follicle to be converted to cl. Initial development of lactation, stimulates cl, no effect on males. Promotes muscle glycogen levels, ketogenesis (breaking down muscle for fuel) Promotes release of thyroxine from thyroid gland. Stimulates increase in body size, protein synthesis, milk production. Aids in adaptation to light/dark cycles - mood. Affects development/function of gonads - light therapy. Needed for proper differentiation of body structures. Affects ca & p levels of bones, kidneys. Insulin produced by beta cells ; hypoglycemic. Gets glucose across cell membrane where it can be metabolized. Glucagon produced by alpha cells ; hyperglycemic.
