Ch. 11-Endocrine System Flashcards

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1
Q

pineal gland

A

regulates circadian rhythms

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2
Q

thyroid and parathyroid glands

A

regulate metabolic rate and blood calcium level

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3
Q

adrenal glands

A

regulate water and electrolyte levels

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4
Q

pancreas

A

regulates blood sugar levels

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5
Q

pituitary gland

A

regulates many other endocrine glands

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6
Q

thymus gland

A

development of immune system

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7
Q

ovaries

A

regulate female reproductive system

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8
Q

testes

A

regulate male reproductive system

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9
Q

endocrine system

A

collection of glands that secrete hormones directly into the bloodstream

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10
Q

hormones

A

chemicals that act on their target organs to either increase of decrease the target’s activity level

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11
Q

homeostasis

A

maintaining a stable internal environment; endocrine system is responsible for this

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12
Q

exocrine glands

A

release hormones into a duct that carries them outside the body

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13
Q

endocrine glands

A

release hormones directly into the bloodstream, aka ductless glands

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14
Q

endocrine system consists of:

A

two adrenal glands, two ovaries, four parathyroid glands, pancreas, pineal gland, pituitary gland, two testes, thymus gland, and thyroid gland

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15
Q

where are adrenal glands located?

A

above each kidney

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16
Q

two sections of the adrenal gland

A

adrenal cortex and adrenal medulla

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17
Q

adrenal cortex

A

manufactures corticosteroids (mineralocorticoids, glucocorticoids, and steroid sex hormones)

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18
Q

mineralocorticoids

A

aldosterone, regulates sodium

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19
Q

glucocorticoids

A

cortisol, regulates carbohydrates

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20
Q

steroid sex hormones

A

androgens (may be converted to estrogen in bloodstream), regulates secondary sexual characteristics

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21
Q

adrenal medulla

A

secretes epinephrine (aka adrenaline & norepinephrine) which is important during emergency situations because it allows the body to perform better

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22
Q

where are the ovaries located?

A

lower abdominopelvic cavity, female gonads

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23
Q

gonads

A

organs that produce gametes or the reproductive sex cells

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24
Q

ova

A

female gametes

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25
Q

what do ovaries produce?

A

estrogen and progesterone

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26
Q

estrogen

A

responsible for female sexual characteristics and regulation of menstrual cycle

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27
Q

progesterone

A

maintains a suitable uterine environment for pregnancy

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28
Q

where is the pancreas located?

A

along the lower curvature of the stomach

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29
Q

the pancreas is the only organ that has what?

A

both endocrine and exocrine functions: exocrine portion releases digestive enzymes into the duodenum, endocrine section produce insulin and glucagon to regulate blood sugar

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30
Q

islets of Langerhans

A

the endocrine portion of the pancreas, named after Dr. Paul Langerhans, a german anatomist. produce insulin and glucagon

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31
Q

insulin

A

produced by beta cells, lowers blood sugar level

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32
Q

glucagon

A

produced by alpha cells, raises blood sugar level

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33
Q

where are the parathyroid glands located?

A

anterior surface of thyroid gland

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34
Q

parathyroid hormone

A

secreted by parathyroid gland, regulates calcium levels in the blood

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35
Q

where is the pineal gland located?

A

in the thalamus region of the brain

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36
Q

melatonin

A

hormone secreted by the pineal gland that regulates circadian rhythms

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37
Q

where is the pituitary gland located?

A

underneath the brain

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38
Q

two sections of the pituitary gland

A

anterior lobe and posterior lobe, both controlled by hypothalamus

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39
Q

anterior pituitary

A

secretes growth hormone (somatotropin), thyroid-stimulating hormone, andrenocorticotropin hormone, prolactin, follicle-stimulating hormone, luteinizing hormone, and melanocyte stimulating hormone

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40
Q

growth hormone

A

(GH, aka somatotropin) promotes growth in the body

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41
Q

thyroid-stimulating hormone

A

(TSH) regulates function of the thyroid gland

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42
Q

adrenocorticotropin hormone

A

(ACTH) regulates function of adrenal cortex

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43
Q

prolactin

A

(PRL) stimulates milk production in breasts after giving birth

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44
Q

follicle-stimulating hormone & luteinizing hormone

A

(FSH&LH) influence male and female reproductive organs

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45
Q

gonadotropins

A

follicle-stimulating hormone and luteinizing hormone

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46
Q

melanocyte-stimulating hormone

A

(MSH) stimulates melanocytes to produce more melanin, darkening the skin

47
Q

posterior pituitary

A

secretes antidiuretic hormone and oxytocin

48
Q

antidiuretic hormone

A

(ADH) promotes water reabsorption by the kidney tubules

49
Q

oxytocin

A

stimulates uterine contractions during labor and delivery, and releases milk from mammary glands

50
Q

where are the testes located?

A

scrotal sac of the male

51
Q

what do testes produce?

A

sperm (male gametes) and testosterone

52
Q

testosterone

A

produces male secondary sexual characteristics and regulates sperm production

53
Q

what does the thymus gland produce?

A

thymosin

54
Q

thymosin

A

important for proper development of the immune system and T cells

55
Q

where is the thymus gland located?

A

mediastinal cavity anterior and superior to the heart

56
Q

where is the thyroid gland located?

A

either side of the trachea and larynx

57
Q

what does the thyroid gland produce?

A

thyroxine, triiodothyronine, and calcitonin

58
Q

thyroxine and triiodothyronine

A

(T4&T3) regulate production of energy and heat in the body to adjust metabolic rate; produce from iodine

59
Q

calcitonin

A

(CT) lowers blood calcium levels

60
Q

endocrinology

A

diagnosis and treatment of conditions and diseases of endocrine glands

61
Q

edema

A

body tissues contain excessive amounts of fluid

62
Q

exophthalmos

A

the eyeballs protrude, generally caused by overproduction of thyroid hormone

63
Q

glycosuria

A

high level of sugar in urine

64
Q

gynecomastia

A

development of breast tissue in males

65
Q

hirsutism

A

excessive amount of hair

66
Q

hypercalcemia

A

high levels of calcium in the blood

67
Q

hyperglycemia

A

high level of sugar in the blood

68
Q

hyperkalemia

A

high level of potassium in the blood

69
Q

hypocalcemia

A

low levels of calcium in the blood

70
Q

hypoglycemia

A

low levels of sugar in the blood

71
Q

hyponatremia

A

low level of sodium in the blood

72
Q

polydipsia

A

excessive feeling of thirst

73
Q

Addison’s disease

A

deficiency of adrenocortical hormones; increased skin pigmentation, generalized weakness, and weight loss

74
Q

adrenal feminization

A

development of female secondary sexual characteristics in a male

75
Q

adrenal virilism

A

development of male secondary sexual characteristics in a female

76
Q

Cushing’s syndrome

A

excessive levels of cortisol; weakness, edema, excess hair growth, skin discoloration, and osteoporosis

77
Q

pheochromocytoma

A

generally benign tumor of adrenal medulla; anxiety, heart palpitations, dyspnea, profuse sweating, headache, and nausea

78
Q

diabetes mellitus

A

chronic disorder of carbohydrate metabolism resulting in hyperglycemia and glycosuria, there are two types

79
Q

insulin-dependent diabetes mellitus

A

type 1; pancreas stops producing insulin, so patient must take daily insulin injections

80
Q

non-insulin dependent diabetes mellitus

A

type 2; pancreas produces insulin but cells fail to respond, so patients may take oral hypoglycemics but may eventually have to take insulin injections

81
Q

insulinoma

A

tumor of islets of Langerhans cells, secretes excessive amounts of insulin

82
Q

peripheral neuropathy

A

damage to nerves in lower legs and hands as a result of diabetes

83
Q

Rechlinghausen disease

A

excessive production of parathyroid hormone resulting in degeneration of bones

84
Q

tetany

A

nerve irritability and muscle cramps from hypocalcemia

85
Q

acromegaly

A

enlargement of the bones of the head and extremities

86
Q

diabetes insipidus

A

caused by inadequate secretion of antidiuretic hormone, may be polyuria and polydipsia

87
Q

panhypopituitarism

A

deficiency in all hormones secreted by pituitary gland

88
Q

cretinism

A

lack of thyroid hormones may result in arrested physical and mental development

89
Q

goiter

A

enlargement of the thyroid gland

90
Q

Graves’ disease

A

overactivity of the thyroid gland, can result in goiter and exophthalmos

91
Q

Hashimoto’s thyroiditis

A

chronic autoimmune form of thyroiditis; results in hyposecretion of thyroid hormones

92
Q

myxedema

A

anemia, slow speech, swollen facial features, edematous skin, as a result of hyposecretion of thyroid gland

93
Q

thyrotoxicosis

A

marked overproduction of the thyroid gland; rapid heartbeat, tremors, thyromegaly, exophthalmos, weight loss

94
Q

blood serum test

A

blood test to measure level of substances in the blood

95
Q

fasting blood sugar

A

blood test to measure amount of sugar in the body after a 12-hour fast

96
Q

glucose tolerance test

A

determines blood sugar levels

97
Q

protein-bound iodine test

A

blood test to measure concentration of thyroxine in the bloodstream

98
Q

radioimmunoassay

A

blood test that uses radioactively tagged hormones to measure quantity of hormone in plasma

99
Q

thyroid function test

A

blood test used to measure levels of thyroxine, triiodothyronine, and thyroid-stimulating hormone in the bloodstream

100
Q

total calcium

A

blood test to measure total amount of calcium

101
Q

two hour postprandial glucose tolerance test

A

blood test to evaluate glucose metabolism

102
Q

thyroid echography

A

ultrasound examination of the thyroid

103
Q

thyroid scan

A

radioactive iodine is administered that localizes in the thyroid gland and can then be visualized

104
Q

chemical thyroidectomy

A

large dose of radioactive iodine is given in order to kill thyroid gland cells

105
Q

glucometer

A

device used for a diabetic to use at home to measure blood sugar

106
Q

hormone replacement therapy

A

artificial replacement of hormones in patients with hyposecretion disorders

107
Q

antithyroid agents

A

medication that blocks production of thyroid hormones

ex) methimazole, tapazole, propylithiouracil

108
Q

corticosteroids

A

treat anti-inflammatory diseases and adrenal cortex hyposecretion disorders
ex) prednisone, Deltasone

109
Q

human growth hormone therapy

A

hormone replacement therapy with human growth hormone to stimulate skeletal growth
ex) somatropin, Genotropin, somatrem, Protropin

110
Q

insulin

A

administered to replace insulin for type 1 diabetics or to treat severe type 2 diabetes
ex) human insulin, Humulin L

111
Q

Oral hypoglycemic agents

A

medications taken by mouth to decrease blood sugar

ex) metformin, Glucophage, glipizide, Glucotrol

112
Q

thyroid replacement hormone

A

hormone replacement therapy for patients with hypothyroidism

ex) levothyroxine, Levo-T, liothyronine, Cytomel

113
Q

vasopressin

A

controls diabetes insipidus and promotes reabsorption of water in kidney tubules
ex) desmopressin acetate, Desmopressin, conivapten, Vaprisol