Chapter 13: The Endocrine System Flashcards
adren/o
adrenal glands
gonad/o
gonads
testic/o
male: testicles
ovari/o
female: ovaries
parathyroid/o
parathyroid glands
pineal/o
pineal gland
pituit/o , pituitar/o
pituitary gland
thym/o
thymus
thyr/o , thyroid/o
thyroid gland
acr/o
extremities (hands and feet), top, extreme point
adren/o
adrenal glands
crin/o
secrete
-dipsia
thirst
glyc/o
glucose, sugar
gonad/o
gonad, sex glands
-ism
condition, state of
pancreat/o
pancreas
poly-
many
somat/o
body
homeostasis
processes through which the body maintains a constant internal environment
hormones
are chemical messengers that are secreted by endocrine glands directly into the bloodstream
endocrine glands
produce hormones, do not have ducts
pituitary gland or hypophysis
a pea-sized gland that is divided into two parts, the anterior and the posterior lobes; stalk-like structure below the hypothalamus in brain, secretes hormones that control the activity of the other endocrine glands
adrenocorticotropic hormone
stimulates the growth and secretions of the adrenal cortex
follicle-stimulating hormone (FSH)
stimulates the secretion of estrogen and the growth of ova (eggs) in the ovaries of the female; In the male, it stimulates the production of sperm in the testicles
growth hormone (GH)
known as the somatotrophic hormone, regulates the growth of bone, muscle, and other body tissues
lactogenic hormone (LTH)
known as prolactin, stimulates and maintains the secretion of breast milk in the mother after childbirth
luteinizing hormone (LH)
stimulates ovulation in the female; In the male, the luteinizing hormone stimulates the secretion of testosterone
melanocyte-stimulating hormone (MSH)
increases the production of melanin in melanocytes, thereby causing darkening of skin pigmentation; usually increases during pregnancy
thyroid-stimulating hormone (TSH)
stimulates the secretion of hormones by the thyroid gland
antidiuretic hormone (ADH)
is secreted by the hypothalamus and stored in the pituitary gland, helps control blood pressure by reducing the amount of water that is excreted through the kidneys
oxytocin (OXT)
stimulates uterine contractions during childbirth; after childbirth, it controls postnatal hemorrhage and stimulates the flow of milk from mammary glands
pitocin
a synthetic form of oxytocin that is administered to induce or speed up labor
pineal gland
very small endocrine gland, known as pineal body; located in the central portion of the brain
melatonin
influences the sleep-wakefulness portions of the circadian cycle
thyroid gland
butterfly-shaped, lies on either side of the larynx, just below the thyroid cartilage
metabolism
describes all of the processes involved in the body’s use of nutrients, including the rate at which they are used
calcitonin
which is produced by the thyroid gland, is a hormone that works with the parathyroid hormone to decrease calcium levels in the blood and tissues by moving calcium into storage in the bones and teeth
parathyroid glands
four, each of which is about the size of a grain of rice, are embedded in the posterior surface of the thyroid gland
parathyroid hormone (PTH)
which works with the hormone calcitonin that is secreted by the thyroid gland; together they regulate the calcium levels in the blood and tissues
thymus
located near the midline in the anterior portion of the thoracic cavity; posterior to (behind) the sternum and slightly superior to (above) the heart; function as part of the endocrine system by secreting a hormone as part of immune system
thymosin
plays an important part in the immune system by stimulating the maturation of lymphocytes into T cells
pancreas
a feather-shaped organ located posterior to the stomach that functions as part of both the digestive and the endocrine systems
pancreatic islets
are those parts of the pancreas that have endocrine functions
glucose
is the basic form of energy used by the body, glucose in the bloodstream is also known as blood sugar
glucagon (GCG)
hormone secreted by the alpha cells of the pancreatic islets in response to low levels of glucose in the bloodstream
insulin
is the hormone secreted by the beta cells of the pancreatic islets in response to high levels of glucose in the bloodstream
adrenal glands
known as suprarenals, are so named because they are located on top of each kidney
electrolytes
are mineral substances-calcium, chloride, magnesium, phosphorus, sodium, and potassium- That are normally found in the blood and other bodily fluids
androgens
sex hormones secreted by the gonads, the adrenal cortex, and fat cells
corticosteroids
the steroid hormones produced by the adrenal cortex
aldosterone (ALD)
a corticosteroid that regulates the sodium and water levels in the body by increasing sodium reabsorption and potassium secretion by the kidneys
cortisol
known as hydrocortisone, a corticosteroid that has an anti-inflammatory action, also helps regulate the metabolism of carbohydrates, fats and proteins in the body, secreted by the adrenal cortex
epinephrine (EPI)
known as adrenaline, stimulates the sympathetic nervous system in response to physical injury or to mental stress such as fear
norepinephrine
both a hormone and a neurohormone; plays an important role in the “fight-or-flight response” by raising blood pressure, strengthening the heartbeat, and stimulation muscles contractions, secreted by the adrenal medulla
gonads
are gamete-producing glands, these are ovaries in females and testicles in males
secondary sex characteristics
refer to features that distinguish the two sexes but are not directly related to reproduction
puberty
the process of physical changes by which a child’s body becomes an adult body that is capable of reproducing
precocious puberty
the early onset of the changes of puberty, usually before age 8 in girls and age 9 in boys
estrogen (E)
a hormone secreted by the ovaries that is important in the development and maintenance of the female secondary sex characteristic and in regulation of the menstrual cycle
progesterone
the hormone released during the second half of the menstrual cycle by the corpus luteum in the ovary, complete the preparation of the uterus for possible pregnancy
gamete
a reproductive cell, these are sperm in the male and ova(eggs) in the female