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70 Cards in this Set

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