Endocrine system Flashcards
what are the organs of the endocrine system?
*thyroid gland
*Thymus gland
*Adrenal gland
*Parathyroid gland
*pancreas
*pineal gland
*hypothalamus
*Pituitary gland
*Ovaries
*Testes
what is the pituitary gland also called?
hypophysis
where is the pituitary gland located?
inferior to the hypothalamus
connected by infudibulum
what are the two lobes of the pituitary gland?
the anterior and posterior lobe
what gland plays an important role in regulating the activity of other endocrine glands?
Pituitary gland
what is the posterior lobe of the pituitary gland also called?
neurohypophysis
what is the posterior lobe of the pituitary gland also composed of?
neurons that originate in the hypothalamus
what is the anterior lobe of the pituitary gland also called?
adenohypophysis
what is the anterior lobe of the pituitary gland also composed of?
glandular tissue
what is the anterior lobe regulated by?
Hypothalamus
what is the growth hormone target?
bones,muscles, & other tissues
what is the growth hormone action?
stimulate growth and divison
what is the Adrenocorticotrophic hormone (ACTH) target?
Adrenal cortex
what is the Adrenocorticotrophic hormone (ACTH) action?
stimulates release of adrenal cortex hormones
what is the Thyroid-stimulating hormone (TSH) target?
thyroid gland
what is the Thyroid-stimulating hormone (TSH) action?
stimulates the release of thyroid hormones
what is the follicle-stimulating hormone (FSH) action?
stimulates the development of ova and sperm
what is the follicle-stimulating hormone (FSH) target?
gonads
what is the Luteinizing hormone target?
gonads
what is the Luteinizing (LH) hormone action?
stimulates secretion of sex hormones
what is the prolactin (PRL) hormone target?
mammary glands
what is the prolactin hormone (PRL) action?
stimulates milk production
what is the target of melanocyte-stimulating hormone (MSH)
melanocytes
what is the action of melanocytes-stimulating hormone(MSH)
stimulates melanin production
what are the hormones of the anterior pituitary gland (adenohypophysis)
*growth hormone
*Adrenocorticotrophic hormone
*thyroid-stimulating
*follicle stimulating
*luteinizing hormone
*Prolactin
*Melanocyte-stimulating
what is the hormone of the posterior pituitary gland (neurohypophysis)
*antidiuretic
*oxytocin
what is the antidiuretic hormone target?
renal tubules
what is the antidiuretic hormone action?
stimulate water reabsorption
what is the target of oxytocin?
uterus and mammary glands
what is the action of oxytocin?
stimulates uterine contractions during labor and delivery and release of milk
where is the thyroid gland located?
anterior neck
what is stored in the colloid before being released into the bloodstream?
thyroxine and triiodothyronnie
what secretes calcitonin?
parafollicular cells
what is secreted by follicle cells?
Thyroxine (T4) and Triiodothyronine (T3)
what is the target of Thyroxine (T4) and Triiodothyronine (T3)?
every cell in the body
what is the action of Thyroxine (T4) and Triiodothyronine (T3)?
*regulate oxygen utilization
*regulate rate of metabolism of the cells
what is the target of calcitonin?
bone and kidneys
what is the action of calcitonin?
*reduce blood calcium levels
(calciums->bone->excreted by kidneys)
what are the parathyroid glands composed of?
chief cells and oxyphil cells
what do chief cells secrete?
Parathyroid hormone
what is the target of the parathyroid hormone?
bone and kidneys
what are the actions of the parathyroid hormone?
*raise blood calcium level
where are the adrenal gland located?
above each kidney
what are the two regions of the adrenal cortex?
*outer cortex
*inner medulla
what does the adrenal cortex produce?
Corticosteroids hormones
what does the adrenal medulla secrete?
flight or fight hormones
Epinephrine and norepinephrine
what is the target of mineralocorticoid (aldosterone)?
kidneys
what is the action of mineralocorticoids?
increase renal reabsorption of sodium
what is the target of glucocorticoids (cortisol)?
most cells
what is the action of glucocorticoids?
affects rate of glucose metabolic
what is the target of Androgens?
little affect
what is the action of androgens?
Precursor of male and female sex hormones
what are the hormone located in the adrenal cortex?
*mineralocorticoids (aldosterone)
*Glucocorticoids (cortisol)
*Androgens
what are the hormones in the adrenal medulla?
Epinephrine and Norepinephrine
what does epinephrine target?
most cells
what is the action of epinephrine
*increase cardiac activity
*Blood pressure
*Blood glucose levels
what does norepinephrine target?
most cells
what is the action of norepinephrine?
*increase cardiac activity
*Blood pressure
*Blood glucose levels
what is zona glomerulosa part of?
adrenal cortex
what secretes mineralocorticoids?
Zona glomerulosa
what is the zona reticularis a part of?
adrenal cortex
what secretes androgens?
zona reticularis
what are the endocrine cells found in the pancreas?
pancreatic islet
what do pancreatic islets secrete?
Insulin and glucagon
Are pancreatic acini exocrine or endocrine?
exocrine
what do pancreatic acini cells secrete?
secrete digestive enzymes and buffers
what kind of cells are beta cells?
endocrine cells
what doe beta cells secrete?
insulin
what kind of cells are alpha cells?
endocrine cells
what do alpha cells secrete?
glucagon
what is the target of insulin hormone?
every cell in body
what is the action of the insulin hormone?
*lower blood glucose levels
what is the target of glucagon hormone?
Liver
what is the action of the glucagon hormone?
raise the blood glucose level
Diabetes insipidus
hyposecretion of antidiuretic hormone
Diabetes mellitus
hyposecretion of insulin
Dwarfism
hyposecretion of growth hormone
Gigantism
hypersecretion of growth hormone
Hashimoto disease
(low metabolic rate¸ weakness¸ mental and physical sluggishness)
hyposecretion of T3 and T4
Hypoglycemia (low levels of glucose)
hyposecretion of insulin
Pheochromocytoma—increased heart rate¸ and blood pressure
hypersecretion of epinephrine
Recklinghausen’s disease of bone—the bones lose calcium and the blood calcium level is too high
hypersecretion of parathyroid hormone
Tetany—low blood level of calcium¸ leading to muscle and nerve irritability
hyposecretion of parathyroid hormone
Virilism—the appearance of male secondary sexual characteristics in a female
hypersecretion of androgens
what do intestinal cells secrete?
Testosterone
what are parafollicular cells also called?
Clear or C cells
what is the circadian rhythm?
The body 24-hour clock