Glands | Hormones | Endocrine system | Homeostasis | Pathology |
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Lister 3 major endocrine glands
1. Hypothalamus 2. Pituitary 3. Thyroid gland 4. Parathyroid glands 5. Thymus gland 6. Pineal gland 7. Pancreas 8. Adrenal glands
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What is estrogen?
Responsible for the development of breasts
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What are the messengers of the endocrine system?
Hormones
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What is more common in the endocrine system: positive feedback or negative feedback?
Negative feedback
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What condition is caused by excessive GH secretion in childhood?
Gigantism
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What is the biggest endocrine gland?
The pancreas
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What is testosterone?
Causes facial hair growth, larynx enlargement, and sex organ development in males
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How do hormones travel through the body?
Through the bloodstream
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Which two hormones are produced by the pancreas to regulate blood glucose levels?
Insulin and glucagon
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What disease is characterized by abnormally high blood glucose levels?
Diabetes
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Which gland is known as the master gland and why
The Pituitary Gland because it stimulates most of the glands to release their hormones
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What is insulin?
Allows the cells in the muscles, fat and liver to absorb glucose that is in the blood
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What occur on the cell membranes and are necessary for binding hormones?
Receptor cells
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What two categories of hormones does the hypothalamus produce to regulate the secretion of other hormones?
RH (releasing hormones) and IH (inhibiting hormones)
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A lack of iodine in the diet causes the thyroid gland to enlarge. What is this condition called?
Goiter
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What are the ovaries and testes?
These glands are responsible for male and female sex development and onset of puberty
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What is the parathyroid hormone?
Helps increase the rate of calcium absorption
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Where are hormone receptors found?
On target cells
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Calcitonin is secreted when blood calcium levels get too high. It opposes the action of which hormone?
Parathyroid hormone
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What is the autoimmune disease that causes hypersecretion of thyroid hormones?
Graves Disease
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If a person has diabetes insipidis, in which gland would you look for the cause?
the pituitary gland
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What is Adrenalin?
A hormone secreted by the adrenal glands, especially in conditions of stress, increasing rates of blood circulation, and breathing
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What types of hormones bind to extracellular receptors? What types of hormones bind to intracellular receptors?
Intracellular: peptide & amino acid derivatives Extracellular: lipid derivatives
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Explain how a negative feedback loop works
A stimulus causes the creation of a product which then negates the stimulus.
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What disorder is characterized by oversecretion of cortisol, usually caused by a pituitary tumor?
Cushing's syndrome
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