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161 Cards in this Set

  • Front
  • Back

retroperitoneal organs

adrenal glands


kidneys


bladder


ureter


rectum

retroperitoneal organs are covered by?

parietal peritoneum

dense layer of adipose tissue that acts as cushioning and engulfs renal capsule?

perirenal fat

inner part of the adrenal gland?

medulla

adrenal medulla formed from?

neural crest cells

outer part of adrenal glands?

cortex

adrenal cortex formed from?

mesoderm

layers of the adrenal cortex from superficial to deep?

zona glomerulosa, zona fasciculata, zona reticularis




GFR

main glucocorticoid?

cortisol

main androgen?

androstenedione

main mineralocorticoid?

aldosterone

type of innervation to the adrenal gland?

sympathetic

postganglionic cells of ANS derived from?

neural crest cells

how is innervation of the adrenal gland different from other ANS nerves?

preganglionic neurons synapse directly with cells in adrenal medulla

alpha 1, alpha 2, beta adrenergic receptors have which ligands?

epinephrine and norepinephrine

alpha 1 couples to what and produces what effect?

Gq > phospholipase C > IP3 > increases intracellular Ca2+ > smooth muscle contraction




vasoconstriction of coronary arteries and veins




decreased GI smooth muscle motility

alpha 2 couples to what and produces what effect?

Gi > decrease in cAMP activity > smooth muscle contraction

beta couples to what and produces what effect?

Gs > adenylate cyclase > increase in cAMP activity > smooth muscle relaxation, heart muscle contraction, glycogenolysis




increased HR, CO

another prominent glucocorticoid?

cortisone

another androgen?

DHEA (dehydroepiandro-sterone)

HPA axis stands for?

hypothalamus, pituitary, adrenal

3 modes of HPA regulation

rhythm (ACTH peaks in AM)


negative feedback by cortisol


stress (overrides normal mechanisms)

hypothalamic hormone to regulate adrenal system?

CRH (corticotropin-releasing hormone)

pituitary hormone to regulate adrenal system?

ACTH (adrenocorticotropic hormone)

which hormone is under circadian regulation?

ACTH

adrenal precursor?

cholesterol

are there regulatory effects at the level of corticosteroid receptors

yes

cause neurohormones to be secreted from hypothalamic nuclei?

nerve impulses

neurohormones pass through the (?) to the anterior pituitary?

hypothalamohypophysial portal system

neurohormones pass out of the capillaries and bind to the receptors of the?

pituitary

hormones from the (?) are carried in blood to their target tissues?

anterior pituitary

binding of neurohormones to receptors on the pituitary can either (?) or (?) release of hormones?

stimulate or inhibit

ACTH details

secreted by anterior pituitary


39 aa peptide, N-term 24 for activity


admin: no oral, IM


half life 20 minutes


released by CRH

CRH details

secreted by hypothalamus


41 aa


used for diagnosis

increases enzyme activities responsible for steroid synthesis?

ACTH

Gs agonist?

ACTH

cosyntropin use

diagnoses of adrenal problems

where in the cortex do glucocorticoids come from?

zona fasciculata

hormone that suppresses the immune system?

cortisol

hormone that inhibits glucose use in cells by stimulating formation of glucose from amino acids (increased blood glucose)?

cortisol

hormone that stimulates glycogen synthesis in the liver?

cortisol

hormone that stimulates lipolysis and protein breakdown?

cortisol

passes through plasma membrane into cytoplasm and binds to form a complex?

cortisol

interacts with heat shock protein 90, heat shock protein 70, and protein FKBP52?

nuclear glucocorticoid receptor

activation of GR complex by cortisol binding does what?

releases heat shock chaperones

what does free GR complex do?

dimerize and translocate into nucleus to activate transcription

what does the GR dimer bind to once inside the nucleus?

binds to GRE

first studied nuclear receptor?

corticosteroid receptors

catabolic outside of liver?

glucocorticoids

cause homeostatic increase in insulin secretion?

glucocorticoids

decrease peripheral glucose uptake?

glucocorticoids

cause net fat deposition?

glucocorticoids

net availability of glucose to brain?

glucocorticoids

anti-inflammatory effect?

glucocorticoids

decrease capillary permeability?

glucocorticoids

increase platelets and RBC?

glucocorticoids

increase gastric secretions?

glucocorticoids

excitatory in nervous system?

glucocorticoids

which part of the adrenal cortex do mineralocorticoids come from?

zona glomerulosa

electrolyte balancing hormones?

mineralocorticoids

mineralocorticoid produced in greatest amount?

aldosterone

synthesis stimulated by ACTH, K+ levels in blood, plasma acidosis?

mineralocorticoids

hormone under slightly different regulatory control?

aldosterone

hormone that causes increased urinary and other tissues reabsorption of Na+?

aldosterone

hormone that causes decreased reabsorption of K+ and H+?

aldosterone

mineralcorticoid receptor is a?

nuclear receptor

examples of mineralcorticoid toxicity?

hypernatremia, hypokalemia, metabolic alkalosis, excess plasma volume, hypertension

disease categorized by hyposecretion of aldosterone and cortisol?

Addison's disease

autoimmunity, bacterial infection, AIDS attack on adrenal cortex, prolonged treatment with glucocorticoids which suppress pituitary function are the causes for?

Addison's disease

symptoms: weakness, fatigue, weight loss, reduced BP, hypoglycemia




treatment: cortisone, fludrocortisone, saline, glucose

Addison's disease

disease categorized by hypersecretion of cortisol and androgens?

Cushing's syndrome

ACTH pituitary adenoma or zona fasciculata tumors and prolonged treatment of glucocorticoids are the causes for?

Cushing's syndrome

symptoms: muscle wasting, accumulation of fat around face and trunk, increased blood glucose




treatment: reduction in glucocorticoid therapy, tumor reduction

Cushing's syndrome

severe psychological consequences of exposure to, confrontation with, stressful events that the person experiences of highly traumatic?

PTSD

neurological symptoms?

PTSD

coritsol low, catecholamine secretion high, norepi/cortisol ratio increased in?

PTSD

chronic increased norepi/cortisol ratio generates?

maladaptive learning pathway to fear response

increased sensitivity of HPA axis, strong negative feedback of cortisol in cases of?

PTSD

blood glucose levels indicating diabetes?

>126

OGTT diabetic glucose?

>200 mg/dl

elevated HbA1c, high BMI, high body fat, waist to hip ratio




secondary: high triglycerides, high cholesterol (vLDL)




indicative of?

diabetes

type 1 diabetes is?

autoimmune, IDDM, 5-10% of diabetes

type 2 diabetes is?

insulin resistant, NIDDM, 80-90% of diabetes

gestational diabetes can reoccur as?

type 2

how many people have diabetes?

8% (23 million)

abnormal glucose and fatty acid metabolism in?

diabetes

endocrine pancreas disorder in?

diabetes

insulin resistance in?

diabetes (specifically type 2)

an autoimmune disease (type 1)?

diabetes

beta cell dysfunction in?

diabetes

genetically based disease?

diabetes

rapidly increasing public health problem?

diabetes

retroperitoneal organ located along small intestine and stomach?

pancreas

how is the pancreas and exocrine gland?

produces pancreatic digestive juices

how is the pancreas an endocrine gland?

consists of pancreatic islets

types of cells in pancreas?

alpha cells, beta cells, delta cells

alpha cells secrete?

glucagon

beta cells secrete?

insulin

delta cells secrete?

somatostatin (growth hormone inhibiting hormone)

autoimmune based islet cell depletion, loss of insulin secretion, genetics show genes linked to immunity (HLA) or blockages in insulin synthesis in?

type 1 diabetes

decrease in blood glucose causes which type of stimulation of pancreas?

sympathetic

increase in blood glucose causes which type of stimulation of pancreas?

parasympathetic

insulin and glucose work in (same or opposite) directions?

opposite

hyper or hypoglycemia causing unconsciousness?

diabetic coma

too much insulin results in?

insulin shock or reaction

emergency treatment for hypoglycemia?

provide liquid sweets

stimulates insulin gene expression in beta cells?

signal transduction from glucose transporter (GLUT)

stimulates glucagon gene expression in alpha cells?

signal transduction from glucose transporter (GLUT)

measured as indicator of new insulin expression because of slower turnover than insulin?

C protein

what can activate RTKs?

insulin or insulin like growth factor (IGF)

insulin binding and signal transduction effect?

GLUT transporter to cell surface

RTK ligand with less metabolic effect?

IGF

where is glycogen store?

liver

long term storage for glucose?

fat

long term, efficient ATP source?

TCA cycle

rapid, inefficient ATP source?

anaerobic glycolysis

glucose metabolism is regulated by?

insulin and glucagon

major anabolic regulator of dietary glucose disposition, director of fatty acid and amino acid metabolism?

insulin

catabolic for glycogen and fatty acids to produce more glucose in glycolytic pathways?

glucagon

drug targets for treatment of several metabolic disorders and nervous system diseases?

class B GPCRs

regulators that act in opposite direction of insulin?

cortisol/epi

activates glycogen synthetase

insulin

what are insulin sensitizers, alpha glucosidase inhibitors, secretagogues (block K+ channels), RHIs?

drug therapies for diabetes

obese BMI?

>30

one of the largest endocrine glands? vascular?

thyroid gland, highly vascular

only gland in the body that stores hormones?

thyroid

composed of two lobes connected by narrow isthmus, lateral and anterior to trachea, just inferior to the larynx?

thyroid

thyroid is composed of?

follicles and parafollicular cells

thyroid follicles contain?

thyroglobulin

thyroid hormones?

T3 and T4

increases metabolism, increases body temperature, increases normal growth and development?

T3 and T4

T3 and T4 secretion regulation?

TRH (hypothalamus) > TSH (pituitary) > thyroid

TRH secreted by the?

hypothalamus

TSH secreted by the?

pituitary

TSH also known as?

thyotropin

both too little and too much iodine do what?

decrease TH formation

antibodies stimulate TSH receptors in?

Graves Disease

TSH released by the?

anterior pituitary

TRH released by the?

hypothalamus

TRH release regulated by?

thyroxine

has two peptide subunits?

thyrotropin

are T3 and T4 plasma bound?

yes

inactive form of T4?

T3

produced and used within thyroid gland, proteases digest iodinated form to release T3 and T4, don't confuse with TBG (transporter)?

thyroglobulin

necessary for production of T3 and T4?

iodine and tyrosine

thyroglobulin secreted by?

follicular cells

secrete calcitonin when blood Ca2+ levels are high?

parathyroid hormone

how are hormones stored in the thyroid?

attached to thyroglobulin

biosynthesis of thyroid hormones?

iodide in > thyroglobulin synthesized in follicle cell > iodide + tyrosine in thyroglobulin > iodinated tyrosines join to form T4 or T3 > thyroglobulin broken down > T4 and T3 diffuse into circulatory system

thyroid hormone receptors are?

class 2, family 1 nuclear receptors, alpha and beta with two subtypes each




4 known types

THR: alpha 1 in?

cardiac/skeletal muscles

THR: alpha 2?

oncogene c-erb-A

THR: beta 1 in?

brain, liver, kidney

THR: beta 2 in?

hypothalamus and pituitary

hormones of catabolism?

thyroid hormones

thyroid hormones act (slow or fast)?

slow

hormones involved in tissue development?

thyroid hormones

treatment for hypothyroidism?

replacement therapy

treatment for hyperthyroidism?

take out part of thyroid gland




beta blockers to inhibit effects, iodides to block conversion of T4 to T3, antithyroid drugs

secretion of calcitonin from parafollicular cells stimulated by?

high Ca2+ concentration

decreases osteoclast activity and lengthens lifespan of osteoblasts?

calcitonin