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70 Cards in this Set
- Front
- Back
What are the similarities and differences between the endocrine system and the nervous system concerning functions?
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they are both control centers for feedback systems
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What are the similarities and differences between the endocrine system and the nervous system concerning speed of response?
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The nervous system is fast, reacting in miliseconds; the endocrine system is slow, reacting in seconds, minutes, hours, and even days
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What are the similarities and differences between the endocrine system and the nervous system concerning duration of influences?
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the nervous system's duration is breif; the endocrine system's duration is long
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What are the similarities and differences between the endocrine system and the nervous system concerning the effectors controlled?
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the nervous system controls muscles and glands; the endocrine system can control practically every cell in the body
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What are the similarities and differences between the endocrine system and the nervous system concerning the strength of the signal?
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in the nervous system, the signal (Action Potential) strength is fixed; in the endocrine system, the signal strength can vary - the effects of a hormone are relative to the amount of the hormone
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What are the similarities and differences between the endocrine system and the nervous system concerning repair?
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in the nervous system, repair is relatively difficult; in the endocrine system it is fairly easy (since the endocrine system is composed mostly of epithelium, which is continually undergoing mitosis)
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Endocrine gland
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a gland which makes, stores, and secretes hormones
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carrier protein
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a protein to which a hormone may become connected temporarily. The carrier protein transports the hormone through the circulatory system
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target cells
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those cells which have receptors for a hormone
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What are the ten major endocrine glands?
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hypothalamus, pineal body, pituitary gland, thyroid gland, parathyroids, thymus, adrenal glands, pancreas, ovaries (female), testes (male)
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releasing hormones
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hormones which cause a gland to secrete more hormones
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inhibiting hormones
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hormones which cause a gland to secrete fewer hormones
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the pituitary gland is really two different glands. What are they?
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the anterior and the posterior pituitary gland
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GH
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growth hormone, secreted by the anterior pituitary gland, stimulates growth in most tissues
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TSH
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Thyroid stimulating hormone, secreted by the anterior pituitary gland, increases the secretion of thyroxine in the thyroid
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ACTH
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Adrenocorticotropic hormone, secreted by the anterior pituitary gland, increases during times of body stress and increases cortisol
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LH
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Luteinizing hormone, secreted by the anterior pituitary gland, stimulates ovaries (female) or testes (male)
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PRL
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prolactin, secreted by the anterior pituitary gland, stimulates milk production
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MSH
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melanocyte stimulating hormone, secreted by the anterior pituitary gland, increases the synthesis of melanin
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master endocrine gland
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the pituitary gland
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GH-RH
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Growth hormone releasing hormone, secreted from the hypothalamus, stimulates the anterior pituitary gland to produce GH
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CRH
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Corticotropin releasing hormone, secreted from the hypothalamus, stimulates the anterior pituitary gland to secrete ACTH
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GnRH
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Gonadotropin releasing hormone, secreted from the hypothalamus, stimulates the anterior pituitary gland to secrete FSH and LH
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TSH-RH
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Thyroid stimulating hormone releasing hormone, secreted from the hypothalamus, stimulates the anterior pituitary gland to secrete TSH
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PIH
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Prolactin inhibiting hormone, secreted from the hypothalamus, causes the anterior pituitary gland to produce less PRL
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ADH
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antidiuretic hormone, secreted by the posterior pituitary gland, increases the amount of water retained during kidney functions
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OT
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oxytocin, secreted by the posterior pituitary gland, increases uterus contractions during birth and promotes the release of milk
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Thyroxine
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secreted by the thyroid gland, it increases the metabolism rate of most cells in the body
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Calcitonin
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secreted by the thyroid gland, it lowers osteoclast activity, causing blood calcium levels to decrease
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PTH
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parathyroid hormone, secreted by the parathyroids, stimulates osteoclast activity, thus raising blood calcium levels
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adrenal medulla
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the inside of the adrenal gland
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adrenal cortex
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the outer layer of the adrenal gland
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epinephrine
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secreted by the adrenal medulla, it increases the rseponse of the sympathetic division of the ANS
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norepinephrine
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secreted by the adrenal medulla, it increases the rseponse of the sympathetic division of the ANS
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Cortisol
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secreted by the adrenal cortex, it rises during times of stress and increases the breakdown of proteins and lipids
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aldosterone
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secreted by the adrenal cortex, it stimulates the kidneys to retain sodium
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pancreatic islets
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cells on the surface of the pancreas which secrete either inuslin or glucagon
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beta cell
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a pancreatic island which secretes insulin
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alpha cell
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a pancreatic island which secretes glucagon
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insulin
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secreted by the pancreas, it stimulates most other cells to take in glucose
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glucagon
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secreted by the pancreas, it stimulates the liver to release glucose
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diabetes mellitus
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an interruption of the endocrine function of the pancreas
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Type 1 diabetes mellitus
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also called "insulin dependent diabetes mellitus", it is the result of the pancreas being unable to produce insulin.
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type 2 diabetes mellitus
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also called "non-insulin dependent diabetes mellitus", it is caused by cells being unable to respond to insulin efficiently due to few or no insulin receptors
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diabetes insipidus
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the result of too little ADH
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thymosin
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secreted by the thymus gland, it is incolced with the development of the immune system
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amine
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a hormone that has been derived from an amino acid
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steroid
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a hormone that has been made from cholesterol
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protein
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can function as a hormone
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peptide
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a short chain of amino acids
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which hormones are amine hormones?
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epinephrine, norepinephrine, thyroxine, and melatonin
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which hormones are steroids?
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cortisol, aldosterone, and the hormones secreted by the testes and the ovaries
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which hormones are either proteins or peptides?
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GH-RH, CRH, GnRH, TSH-RH, PIH, GH, TSH, ACTH, LH, FSH, PRL, MSH, ADH, OT, TH, Calcitonin, PTH, aldosterone, insulin, and glucagon
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What are the three major ways that hormone release is controlled by the body?
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By nonhormonal regulation, direct neural control, and hormonal control
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nonhormonal regulation
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a chemical other than a hormone is involved in regulating the release of a hormone
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direct neural control
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the nervous system regulates the release of a hormone by means of a neurotransmitter or neurohormone
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hormonal control
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one hormone regulates the release of another hormone
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neuroendocrinology
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the field of biology which studies how the nervous system exerts control over the endocrine glands
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Neurosecratory cells
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Neurons of the hypothalamus that secrete neurohormone rather than neurotransmitter
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Grave's disease
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also called hyperthyroidism, it is a disease in which antibodies abnormally block the hypothalamus from sensing thyroxine
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hyperthyroid goiter
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a thyroid which has been enlarged due to Grave's disease
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hypothyroidism
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the condition when TSH promotes growth of the thyroid but no thyroxine comes out
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hypothyroid goiter
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a thyroid which has been enlarged due to hypothyroidism
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Constant secretion
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a pattern of secretion where a hormone is always being secreted
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Acute secretion
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a pattern of secretion where a hormone is normally at very low levels in the body until a particular stimulus occurs, at which time the hormone will increase rapidly
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Cyclic secretion
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a pattern of secretion where a hormone is secreted on a regular, predictable cycle
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membrane-bound receptors
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receptors that are located on the plasma membrane of the target cell; they are stimulated by protein or peptide hormones
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intracellular receptors
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receptors that are located in the cell itself; in this process, the hormone actually enters the cell, travels through the cytoplasm and into the nucleus. There, the hormone binds to a receptor protein in the nucleus, and that receptor protein activates a specific gene in the DNA which gives the cell instructions to make a protein or enzymewhich will produce the desired effect
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Prostaglandins
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Biologically active lipis which produce many effects in the body, including smooth muscle contractions, inflammation, and pain
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parahormones
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another term for prostaglandins
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