Lecture 5 test 2 Flashcards
The endocrine system works with the nervous system to..
Maintain homeostasis
Endocrins system is makeup of..
Endocrine glands(cells, tissues and organs)
Hormones
1.Chemical substances made in one part of body that have an effect on another part of body
2.diffuse into the blood stream to act on specific target cells
Target cells
1.Cells with specific receptor for a hormone
Exocrine glands
1.Secretes products into ducts, outside the internal environment(sweat, mucus, oil or enzymes)
Endocrine glands
1.Secret products into body fluids to affect target cells
2.Lack ducts
3. Act as chemical messengers
5.Influence cell activity elsewhere
Endocrine glands of the body
- Pituitary
2.Thyroid
3.Parathyroid
4.Adrenal
5.Pancreas
6.Pineal
7.Reproductive
8.Thymus
Hypothalamus
1.Maintain homeostasis by linking the endocrine system with the nervous system
2.Stimulates the anterior pituitary gland to produce hormones
3.Stimulates the posterior pituitary gland to secrete stored hormones
Pituitary gland
- Attached to hypothalamus by the infundibulum
Anterior pituitary
1.Makes hormones when stimulated by hypothalamus hormones
2.Hormones are carried in the blood stream by hypophyseal portal veins
3.Stimulated to release or stop releasing their hormone
Posterior pituitary
1.Stores hormones made by the hypothalamus(Oxytocin and ADH)
2.Releases hormones in the blood in response to nerve impulses
Growth hormone imbalances can cause:
1.Pituitary dwarfism
2.Gigantism
3.Acromegaly
What is needed by the follicular cells to make thyroid hormones?
Iodine
What is a major factor in determining the basal metabolic rate?
Thyroid hormone
Hypothyroidism
- Underactivity of thyroid gland
2.Low metabolic rate, fatigue and weight gain in adults
3.In babies, poor growth and bone formations, abnormal mental development