Hormone producing glands that helps maintain homeostasis Endocrine System Hormone producing glands that helps maintain homeostasis
Hormones circulate through the body in the blood
Hormones are: chemicals produced by endocrine glands Able to control body parts
Hormones are specific: Only target cells have the right receptors Other body parts are unaffected
9 main glands
Exocrine glands Endocrine Glands Ducts Yes No Hormones Secrete outside examples Tear ducts Sweat glands Oil glands 9 glands distribution by blood
Exocrine glands Endocrine Glands Ducts Yes No Hormones Secrete outside examples Tear ducts Sweat glands Oil glands 9 glands distribution by blood
Very little hormone is produced at a time 10-12 Mol/L
Hormone production is determined by: Internal Balance (water/salt/nutrients) Nervous system Other endocrine hormones
Hormone impact affected by: Amount of production & Secretion Blood flow to the target area ½ life of the hormone Hormone concentration in blood
½ life of a hormone = time required for breakdown
Antagonistic hormone: Hormones with opposite actions. EX. Insulin converts sugar to fat Glucagon converts fat to sugar
Steroid hormone: Hormones composed of cholesterol. 4 carbon rings
Non-Steroid hormone: Hormones composed of protein or polypeptides or aminoacids. 2 carbon rings
Steroid hormone: Permeable to membranes Receptor in cytoplasm Enters nucleus
Non-Steroid hormone: Not Permeable to membranes Receptor in cell membrane ATP - cAMP
Non-Steroid hormones: Adrenaline LH FSH Anti-diuretic hormone Adrenocorticotropic hormone
Which type of hormone?
Which is a steroid?
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