Endocrine System Biology 12 Jokes of the day

Endocrine System Biology 12

Jokes of the day:

v. Endocrine System and the nervous system often work together to bring about homeostasis v. The division between the nervous and endocrine systems occurs in the hypothalamus. o The hypothalamus regulates the pituitary gland through nerve stimulation. o The pituitary gland regulates the endocrine glands through secretion of chemicals which can also affect the nerve activity of the hypothalamus. Homeostasis

v is the system of glands, each of which secretes different types of hormones directly into the bloodstream to regulate the body. Endocrine System

v Endocrine glands o Ductless organs that secrete their molecules directly into the bloodstream v All endocrine cells are located within highly vascularised areas to ensure that their products enter the bloodstream immediately v Note: Exocrine glands discharge their secretions into ducts that carry them where they are used (ex. glands of the digestive system). Endocrine Glands

THE GLANDS

v this is the “master Gland” which controls other endocrine glands associated with hormones v Anterior lobe o o o TSH: thyroid stimulating hormone, regulates cell metabolism FSH: follicle stimulating hormone, stimulates follicle and sperm development LH: luteinizing hormone, stimulates ovulation and production of testosterone GH: growth hormone (somatotrophin STH), promotes growth ACTH: adrenocortictropic hormone, stimulates release of hormones involved in stress response. PRL: prolactin, stimulates milk production in lactating females. v Posterior lobe o oxytocin: stimulates contraction of muscles in the uterus, triggers milk release o ADH: antidiruretic hormone ( increases reabsorption of water) o vasopressin: helps maintain the body’s water balance/blood pressure. 1. Pituitary gland

v controls the release of hormones from the pituitary and is a major link between nervous and endocrine systems. v. TSH is associated with this gland. 2. Hypothalamus gland

vaffects sexual development and biorhythms 3. Pineal Gland

v influences the metabolic rate vit is associated with the hormone thyroxine 4. Thyroid Gland

v controls the blood calcium in the neck area 5. Parathyroid Glands

v aids in immunity, it is the organ in which the lymphocytes mature (T cells) 7. Thymus Gland

v production of hormones that regulate the level of sugar in the blood. o If blood sugar is high it produces Insulin to reduce sugar level. o When blood sugar is low glucagon is produced. 8. Pancreas

vlocated on top of the kidneys. o o adrenalin – helps to cope with stress, converts glycogen to glucose. cortisone – prevents inflammation and increases the level of sugar in the blood. 9. Adrenal Gland

v production of male sex hormone (testosterone) v causes secondary sex characteristics, stimulates sperm production 10. Testis

v production of female sex hormones o o estrogen: development of secondary sex characteristics, prepares uterus for pregnancy. progesterone: maintains the uterus during pregnancy 11. Ovaries

v. Read Chapter 8 v. Page 377 #1, 2 v. Page 383 #1 v. Page 387 #1 – 4, 6 v. Page 392 # 1, 2 To do :