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Endocrine system
302.3 Vet nursing The Endocrine System
Question | Answer |
---|---|
What is the endocrine system | Secretes hormones into the blood stream |
What is the difference between the endocrine and exocrine systems? | Endocrine secrete into blood stream (only hormones), exocrine use a duct system and dont travel far (sweat or saliva) |
7 endocrine glands | Pituitary, Pancreas, Thyroid, Parathyroid, Adrenal, Gonads, Pineal gland |
Endocrine secretions of pancreas | Glucagon and insulin |
Where are the pancreatic hormones secreted? | Islets of langerhan |
Which cells in the pancreas secrete glucagon | Alpha cells |
Which cells in the pancreas secrete insulin | Beta cells |
What do the Delta cells in the pancreas secrete and its purpose? | Somatostatin, stops wild fluctuations in blood sugar. Also decreases gut motility and enzyme secretion. |
Where is the pituitary located? | Under the hypothalamus |
2 sections of the pituitary | Anterior and posterior |
What hormones does the anterior pituitary gland secrete? | Adrenocorticotrophic hormone (ACTH), Leutenising hormone (LH) or Interstitial cell stimulating hormone (ICSH), Thyrotrophic stimulating hormone (TSH), Follicle stimulating hormone (FSH), Growth hormone (GH) |
What hormones does the posterior pituitary gland secrete? | Antidiuretic hormone (ADH), Oxytocin |
What hormones does the thyroid secrete? | Tri-iodothyronine (T3), tetra-iodothyronine (T4 or thyroxin) and Calcitonin |
What do the hormones T3 and T4 control? | Metabolic rate of cells. Essential for normal growth. |
What does calcitonin control? | Inhibits resorption of bone and decreases calcium in the blood |
Cells in parathyroid which secretes hormone? | Chief cells |
What does the parathyroid control? | Increases calcium in blood by increasing reabsorption from kidneys, small intestine and bone |
What does the pineal gland control? | Secretes melatonin to promote sleep cycle |
2 sections of the adrenal glands | Cortex and medulla |
What does the adrenal cortex secrete? | Glucocorticoids, Mineralocorticoids and some sex hormones |
What does the adrenal medulla secrete? | Adrenaline and noradrenaline |
What is Addisons disease? | Hypoadrenocorticism |
What is Cushings disease? | Hyperadrenocorticism |
Hormones that control feather growth in birds? | Prolactin and thyroxine |
Primary corticosteroid in birds? | Corticosterone (instead of cortisol) |
Hormone in reptiles which is produced rather than oxytocin? | Vasotocin |
Additional endocrine gland in reptiles responsible for melatonin production along with pineal gland? | Pareital eye |
Gland in reptiles which has a role in hybernation? | Thyroid |