HESI ANATOMY & PHYSIOLOGY ENDOCRINE SYSTEM Flashcards
Endocrine gland-
gland that secretes hormones carried by the blood.
Exocrine gland
gland that secretes hormones into ducts.
endocrine system
Control Nervous system
series of glands that secrete hormones that cause changes in the body to keep the body’s systems in balance
The endocrine glands include the
Pituitary
Pineal
Thyroid
Parathyroids
Thymus
Pancreas
Adrenals
Ovaries/testes
Amines
derived from amino acids
synthesized in the adrenal medulla
Peptides
short-chained amino acids found in the posterior pituitary gland and hypothalamus.
Steroid
derived from cholesterol and are lipid soluble
transported in the blood
Hormones can travel through
bloodstream, to nearby cells or even to other locations within the same cell.
non-steroidal hormones
Hypothalamus
Anterior pituitary
Posterior pituitary
Parathyroid
Adrenals
Thyroid
Pancreas
Hypothalamus
brain located anterior and inferior to the thalamus
Pituitary gland-
pea-sized endocrine gland at the base of your brain
ocated outside of the brain in the sphenoid bone in an area known as the sella turcica
ascular network transports hormones that control the secretions of the anterior pituitary.
2 step process for release of anterior pituitary hormones
1 is when the hypothalamus releases a hormone that travels to the anterior pituitary by way of the vascular network.
Step 2 is when the anterior pituitary releases its hormone.
Growth hormone is secreted by
anterior pituitary in response to 2 releasing hormones secreted by the hypothalamus.
Growth hormone promotes the
growth of body tissues
Adrenocorticotropic hormone or ACTH
secreted by the anterior pituitary in response to corticotropin releasing hormone secreted by the hypothalamus.
helps to identify its function by its name
adrenal cortex
responds to ACTH by releasing cortisol and aldosterone
Cortisol
is a steroid hormone that helps to regulate blood glucose
Aldosterone
works to increase the reabsorption of sodium by the kidneys
helps with blood pressure regulation since retaining sodium also causes increased water retention
Thyroid stimulating hormone or TSH
secreted by the anterior pituitary in response to thyrotropin releasing hormone secreted by the hypothalamus
Follicle Stimulating hormone (FSH) and luteinizing hormone (LH)
both secreted by the anterior pituitary in response to gonadotropin releasing hormone secreted by the hypothalamus.
females, FSH and LH
promotes the development of ovarian follicles
LH triggers ovulation
males, FSH and LH
FSH supports sperm development,
LH stimulates the release of testosterone.
Posterior pituitary hormones
play roles in fluid volume and childbirth.
neurosecretory cells
long cells in the hypothalamus
extend into the posterior pituitary and release hormones there.
ADH
secreted by the posterior pituitary in response to changes in blood solute concentration.
antidiuretic which means that it works to conserve fluid volume versus a diuretic which works to reduce fluid volume.
has an effect on the kidneys to promote the conservation of water
oxytocin
plays a role in labor and delivery by stimulating uterine contractions.
It also works to promote release of milk by the mammary glands.
In males oxytocin may play a role in smooth muscle contraction such as during ejaculation.