Endocrine part 2 Flashcards
Found at the base of the throat and Consists of two lobes and a
connecting isthmus
Thyroid Gland
Thyroid Gland Produces two hormones
Thyroid hormone
Calcitonin
Major metabolic hormone and Composed of two active
iodine-containing hormones
Thyroid hormone
two active iodine-containing hormones of the thyroid gland
Thyroxine
Triiodothyronine
It is secreted by thyroid follicles
Thyroxine
USe as the conversion of T4 at
target tissues
Triiodothyronine
Thyroxine is also known as
T4
Triiodothyronine is also knwon as
T3
A Thyroid hormone disorder that the Thyroid gland enlarges due
to lack of iodine
Goiters
To prevent goiters, _____ is iodized
salt
It is Caused by hyposecretion of
thyroxine. IT Results in dwarfism during childhood
Cretinism
Caused by hypothyroidism in
adults which Results in physical and
mental slugishness
Myxedema
Caused by hyperthyroidism which Results in increased metabolism, heat intolerance, rapid heartbeat, weight loss, and exophthalmos
Graves’ disease
Decreases blood calcium levels
by causing its deposition on
bone
Calcitonin
Calcitonin is Antagonistic to
parathyroid hormone
Calcitonin is Produced by
parafollicular cells
Parafollicular cells are found
between the
follicles
Tiny masses on the posterior of the
thyroid that Secrete parathyroid hormone (PTH)
Parathyroid Glands
Stimulate osteoclasts to remove
calcium from bone, Stimulate the kidneys and intestine to absorb more calcium and Raise calcium levels in the blood
parathyroid hormone (PTH)
degrade bone matrix and release
Ca2+ into blood
Osteoclasts
stimulates calcium salt
deposit in bone
Calcitonin
Sit on top of the kidneys
Adrenal Glands
Two regions of Adrenal Glands
Adrenal cortex
Adrenal medulla
outer glandular region that has three layers
Adrenal cortex
three layers of the Adrenal cortex
Mineralocorticoids secreting
area
Glucocorticoids secreting
area
Sex hormones secreting
area
inner neural tissue region in the adrenal glands
Adrenal medulla
A type of corticosteroids that is mainly aldosterone. It Produced in outer adrenal cortex, Regulate mineral content in blood and Regulate water and electrolyte balance
Mineralocorticoids
Mineralocorticoids is mainly
aldosterone
Target organ of Mineralocorticoids is
kidney
It helps in the Production stimulated by renin and aldosterone and Production inhibited by atrial
natriuretic peptide (ANP)
Mineralocorticoids
Glucocorticoids includes
cortisone and cortisol
It is Produced in the middle layer of
the adrenal cortex. It Promote normal cell metabolism and Help resist long-term stressors
Glucocorticoids
Glucocorticoids Released in response to ____________ blood levels of ACTH
increased
epinephrine and norepinephrine are also known as
Catecholamines
It is Produced in the inner layer of the adrenal cortex and Small amounts are made throughout life
Sex hormones
Sex hormones in the inner layer produces mostly _________ but it also forms estrogens
androgens
Results from hyposecretion of all adrenal cortex hormones
Addison’s disease
It causes Bronze skin tone, muscles
are weak, burnout, susceptibility to infection
Addison’s disease
May result from an ACTH-releasing tumor which could cause Excess water and sodium are retained leading to high blood pressure and edema
Hyperaldosteronism
Results from a tumor in the
middle cortical area of the
adrenal cortex
Cushing’s syndrome