A&P Final Flashcards
Endocrine glands secrete chemicals called
hormones
Endocrine glands are
ductless
Hormones secreted by endocrine glands are secreted where
directly into capillaries
VOCAB: Target Organs/Target Tissue
Organs or tissues “targeted” by hormones which then have specific effects on the “targets”
3 groups of hormones
amines, proteins and steroids
When are hormones secreted?
When there is a need for them
Cells in the endocrine glands respond to what?
changes in blood or to other hormones in blood
VOCAB: negative feedback mechanism
information about the hormonal effects is “fed back” to the gland, which then DECREASES (negative) the secretion of the hormone
VOCAB:
Hypophysis is AKA
pituitary gland
VOCAB:
Infundibulum
short stalk that the pituitary gland hangs from the hypothalamus
VOCAB:
neurohypophysis
posterior pituitary
VOCAB
adenohypophysis
anterior pituitary
ADH
antidiruetic hormone produced by hypothalamus and stored/released by posterior pituitary
oxytocin
produced by the hypothalamus and stored/released by the posterior pituitary
ADH is AKA
vasopressin
VOCAB
Milk Let Down reflex is caused by:
release of oxytocin which stiumlates the contraction of smooth muscle around mammary glands
Growth Hormone is AKA
somatotropin
What promotes growth indirectly by increasing the transport of amino acids into the cells, increasing the rate of protein sysnthesis
Growth Hormone
What stimulates cell division in tissues capable of mitosis
Growth Hormone
VOCAB:
TSH is AKA and is defined how?
thyrotropin. Target organ is the thyroid gland and then it stimulates normal growth of thyroid and secretion of T4 and T3
ACTH is AKA
adrenocorticotropic Hormone
What does ACTH do
stimulates secretion of cortisol by adrenal cortex and is produced in any physiological stress situation
VOCAB
Hypoglycemia
deficiency of glucose in the blood stream
Responsible for lactation
Prolactin
Gonadotopic hormone that stimulates follicles
FSH aka Follicle Stimulating Hormone
Gonadotropic hormone responsible for ovulation
Luteninizing hormone
VOCAB
Isthmus
middle connection piece of thyroid gland
What produces T4 and T3
Thyroid follicles
Iodine is required for synthesis of T4 and T3
True or False
True
T4 and T3 do what
increase cell respiration of all food types and increase energy and heat production
True or False
T4 and T3 are essential for normal physical growth, normal mental development and maturation of reproductive system
TRUE
Secretion of T3 is by
stimulation of TSH from anterior pituitary gland
Decresases reabsorption of calcium and phosphate from bones to blood
Calcitonin
VOCAB
Hypercalcemia
The presence of abnormally high levels of calcium in the blood; usually the result of excessive bone resorption in hyperparathyroidism
Parathyroid gland produces
parathyroid hormone (PTH)
Parathyroid hormone
increases reabsorption of Ca and phosphate thereby raising their level
Calacitonin and Parathyroid hormone work together to
maintain blood calcium at normal range
VOCAB
Islets of Langerhans
hormone producing cells in the pancreas
Alpha cells produce
glucagon
beta cells produce
insulin
Both alpha and beta cells are part of
Islets of Langrehans in the pancreas
VOCAB
glycogenolysis
glycogen to glucose breakdown
VOCAB
gluconeogenesis
making new glucose
Increases the transport of glucose from blood into cells increasing the permeability of cell membranes to glucose
Insulin
VOCAB
glycogenesis
glycogen production
Insulin secretion is stiumlated by
hyperglycemia
VOCAB
Delta Cells
produce somatostatin, which inhibits secretion of insulin and glucagon
Adrenal Glands aka
suprarenal glands
2 parts of adrenal glands
inner adrenal medulla and outer cortex
VOCAB
Catecholamines
neruotransmitter that has an effect on the sympathetic nervous system
Epinepherine and Norepinephrine are produced where
adrenal glands
Norepinephrine significant function
vasoconstriction in the skin, viscera and skeletal muscles (raises BP)
Epinepherine
increases HR, increases the use of fats for energy and increases the rate of cell respiration
Adrenal Cortex secrete what 3 types of steroid ormones
mineralocorticoids, glucocorticoids and sex hormones
VOCAB
Mineralocorticoids
A corticosteroid, such as aldosterone, that is involved with maintaining the salt balance in the body.
VOCAB
glucocorticoids
any of the group of corticosteroids predominantly involved in carbohydrate metabolism
Most abundant mineralocorticoids
Aldosterone
Aldosterone does what
targets KD and increases re-absorption of sodium and excretion of potassium
Most important glucocorticoid
Cortisol
Cortisol is an
inflammatory
Benefit of estrogen
lowers blood levels of cholesterol and TG
promotes the storage of glycogen and further growth of blood vessels in the endometrium
progesterone
2 hormones secreted by the placenta
progesterone and estrogen
secreted by the corpus luteum
Inhibin
2 hormones secreted by testes
testosterone and inhibin
Secreted by the substentacular cells of the testes
Inhibin