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178 Cards in this Set

  • Front
  • Back
What portion of thalamus relays:
Somatosensory from body
VPL
What portion of thalamus relays:
Cerebellum and basal ganglia-->motor cortex
VL
What portion of thalamus relays:
Trigeminothalamic and taste-->somatosensory cortex
VPM
What portion of thalamus relays:
Mamillothalamic tract-->cingulate gyrus
Anterior nucleus
What portion of thalamus relays:
Integration of visual, auditory, and somesthetic input
Pulvinar (sp)
What portion of thalamus relays:
Memory loss if destroyed
Medial dorsal
What portion of thalamus relays:
Brachium of inferior colliculus-->primary auditory cortex
Medial geniculate body
Tumor marker for:
Hepatocellular carcinoma (HBV and HCV patients)
AFP
Tumor marker for:
Ovarian cancer
CA125
Tumor marker for:
Melanoma
CA199, CEA
Tumor marker for:
Colon cancer
CEA
Tumor marker for:
Astrocytoma
S100
A 70 year-old patient develops pneumonia.

Organism?
Strep pneumo
H flu
What is the mechanism of action of disulfiram?

What other drugs have a disulfiram reaction?
Inhibits acetaldehyde DH

Metronidazole
Procarbazine
1st generation sulfonylureas
Cephalosporins
MOA of:
Protease inhibitors
Inhibit viral assembly by inhibiting protease enzyme
MOA of:
Nucleoside reverse transcriptase inhibitors
Nucleic acid analog inhibits reverse transcriptase and prevents integration of viral DNA into host genome
MOA of:
Non-nucleoside reverse transcriptase inhibitors
Inhibit reverse transcriptase by binding non-competitively (and directly) to enzyme

IRREVERSIBLE
MOA of:
Fusion inhibitors
Bind viral gp41 and inhibit fusion with CD4 cells
What are the common circumstances when passive immunity is required?
testanus, botulinum, HBV, rabies, RSV
Which nerve is damaged:
Loss of forearm pronation
Median
Which nerve is damaged:
Loss of arm and forearm flexion
Musculocutaneous
Which nerve is damaged:
Trouble initiating arm abduction
Suprascapular n
Which nerve is damaged:
Unable to raise arm above horizontal
Long thoracic, spinal accessory
Which abnormality:
Boot-shaped heart
RVH
Which abnormality:
Continuous machine-like murmur
PDA
Which abnormality:
Tendon xanthomas
Familial hyperchol
Which abnormality:
Subluxation of lenses
Marfan's
Which abnormality:
Cafe-au-lait spots
Neurofibromatosis type I
McCune-Albright Syndrome
Which abnormality:
Tuft of hair on lower back
Occult spina bifida
What adult cell types arise from neural crest cells?
ANS
DRG
Melanocytes
Adrenal chromaffin cells (make catechols)
Pia, arachnoid cells
Bone to skull
Etc.......
Metastasis to brain commonly comes from __________.
Lots of bad stuff kills glia
Lung
Breast
Skin (melanoma)
Kidney (RCC)
GI tract cancers
Metastasis to liver commonly comes from __________.
Cancer sometimes penetrates benign liver.

Colon, stomach, pancreas, breast
Metastasis to bone commonly comes from __________.
PT barnum loves kids

Prostate
Thyroid
Breast
Lungs
Kidney
What are the 4 types of epithelial cell junctions?
Zona occludens--tight jns

Zona adherens--intermediate jn w/actin and e-cadherin

Macula adherens--desmosomes

Gap jns
What are the 4 proteins involved in non-epithelial adhesion mechanisms?
Selectins, integrans, i-cams, cadherins
Label
1. Vesiculus cuneatus
2. Vesiculus gracilis
3. Lissauer's tract
4. Lateral corticospinal tract
5. Vestibulospinal tract
6. Reticulospinal tract
7. Anterior (ventral) corticospinal tract
8. Anterior (ventral) spinothalamic tract
9. Lateral spinothalamic tract
10. Anterior (ventral) spinocerebellar tract
11.Posterior (dorsal) spinocerebellar tract
Which pathology:
Psammoma bodies
PSMM
Papillary adenoca of thy
Serous cystadenoca of ovary
Meningioma
Mesothelioma
Which pathology:
Posterior cervical adenopathy
EBV-->mono
Cat scratch
Acute otitis media
Which pathology:
Lytic bone lesions on x-ray
Multiple myeloma
Which pathology:
Thyroid-like appearance of kidney
Chronic bacterial pyelonephritis
Which pathology:
Low serum ceruloplasmin
Wilson's dz
Drug class:
Azathioprine
Immunosuppress
Drug class:
Probenecid
Used for gout, inhibits uric acid reabsorption
Drug class:
Primaquine
Anti-malarial
Drug class:
Cefprozil
2nd gen cephalosporin
Drug class:
Lamivudine
NRTI
Drug class:
Tobramycin
Aminoglycoside
Drug class:
Losartan
ARB
Drug class:
Indinavir
HIV protease inhibitor
Drug class:
6-mercaptopurine
Anti-cancer
Drug class:
Rofecoxib
COX2 inhibitor
Drug class:
Carmustine
Nitrosylurea
Drug class:
Doxycyline
Tetracycline
Drug class:
Timolol
Beta-blocker
Drug class:
Methotrexate
Inhibitor of DHF reductase
Drug class:
Cimetidine
H2RA
Drug class:
Mefloquine
Anti-malarial
What is the MOA of N-acetylcysteine when given as an antidote for acetaminophen overdose?
Regenerates glutathione
Which hormone:
Stimulates bone and muscle growth
GH via IGF-1
Which hormone:
Stimulates milk production and secretion
PL
Which hormone:
Stimulates milk secretion during lactation
Oxytocin
Which hormone:
Responsible for female secondary sex characteristics
Estrogen
Which hormone:
Stimulates metabolic activity
T4
Which hormone:
Increases blood glucose level and decreases protein synthesis
Glucocorticoids--cortisol
Which hormone:
Responsible for male secondary sex characteristics
T
Which hormone:
Prepares endometrium for implantation/maintenance of pregnancy
PG
Which hormone:
Stimulates adrenal cortex to synthesize and secrete cortisol
Adrenocorticotropic hormone (ACTH)
Which hormone:
Stimulates follicle maturation in females and spermatogenesis in males
FSH
Which hormone:
Increases plasma calcium, increases bone resorption
PTH
Which hormone:
Decreases plasma calcium, increases bone formation
Calcitonin
Which hormone:
Stimulates ovulation in females and testosterone synthesis in males
LH
Which hormone:
Stimulates thyroid to produce T4 and uptake iodine
TSH
Secreted from where:
Growth hormone
Anterior Pit
Secreted from where:
Thyroid hormone
Thy
Secreted from where:
Glucocorticoids
Zona fasciulata of adrenal cortex

Glucocorticoids = CORTISOL
Secreted from where:
Progesterone
Ovaries
Placenta
Secreted from where:
Prolactin
Ant pituitary
Secreted from where:
Oxytocin
Made in hypothal (paraventricular nuclei) but stored in posterior pituitary
Secreted from where:
Atrial natriuretic hormone
Heart
Secreted from where:
Glucagon
alpha cells in pancreas
Secreted from where:
Testosterone
Testis in males
Ovaries in females
Zona reticularis of adrenal cortex
Secreted from where:
Follicle stimulating hormone
Anterior pituitary
Secreted from where:
Vasopressin
Hypothal (supraoptic nuc) stored in post pit
Secreted from where:
Calcitonin
Parafollicular C cells of thyroid
Secreted from where:
Thyroid stimulating hormone
Ant pit
Secreted from where:
Epinephrine and norepinephrine
Chromaffin cells of adrenal medulla
Secreted from where:
Insulin
beta cells of pancreas
Secreted from where:
Estradiol
Ovaries
Secreted from where:
Estriol
Placenta
Secreted from where:
Estrone
Fat cells via peripheral conversion
Secreted from where:
Estrogen in males
Testis
Secreted from where:
Parathyroid hormone
Parathyroid
Secreted from where:
Somatostatin
D cells of Pancreas
Secreted from where:
Luteinizing hormone
Ant pit
Secreted from where:
Mineralocorticoids
Zona glomerulosa of adrenal cortex
Secreted from where:
Adrenocorticotropic hormone
Ant pit
Which hormones utilize cAMP pathways?
FLAT CHAMP
FSH
LH
ACTH
TSH
CRH
hCG
ADH (V2 receptor)
MSH
PTH
(anything from ant pit)
Calcitonin
GHRH
glucagon
Which hormones utilize cGMP pathways?
Think vasodilators:
ANP
NO (EDRF)
Which hormones utilize IP3 pathways?
GOAT
GnRH
Oxytocin
ADH (V1 receptor)
TRH
Which hormones bind receptors in the nucleus?
T3/T4
Which hormones bind receptors in the cytosol?
VET CAP
Vitamin D
Estrogen
Testosterone
Cortisol
Aldosterone
Progesterone
Which hormones utilize a tyrosine kinase pathway?
Insulin
IGF-1
FGF
PDGF

(GROWTH FACTORS)
Posterior pituitary:
AKA
Embryonal derivation of _____
Hormones
AKA Neurohypohysis
Arises from neuroectoderm

Stores vasopressin (ADH) and oxytocin
Anterior pituitary:
AKA
Embryonal derivation of _____
Hormones
Adenohyphophysis

Surface ectoderm (Rathke's pouch)

FLAT PiG
FSH
LH
ACTH
TSH
PL
GH
ALL ACT VIA cAMP!--except GH, acts via tyrosine kinase
POMC:
Precursor of ______
ACTH
MSH (melanocyte stimulating hormone)
The alpha-subunit is common to these hormones.

Which subunit determine hormone specificity?
TSH
LH
FSH
hCG

beta-subunit determines hormone specificity
Effect of TRH on pituitary
Hypothal releases TRH and causes TSH & PL release
Effect of DA on pituitary
Inhibits PL release
Effect of CRH on pituitary
Releases ACTH
Effect of GHRH on pituitary
Releases GH
Effect of somatostatin on pituitary
Inhibits GH, TSH
Effect of GnRH on piuitary
Releases FSH, LH
Effect of prolactin on pituitary
Inhibits GnRH release
Bromocriptine:
MOA
DA agonist at pituitary to decrease PL release
Hyperprolactinemia:
Causes
Presentation
Causes:
Pregnancy/nipple stimuln
Stress
Prolactinoma (associated with bitermporal hemianopsia)
DA antagonists: antipsychotics (haloperidol, respiridone), methyldopa

Presentation:
Premenopausal females: hypogonadism-->infertility, oligo/amenorrhea, rarely galactorrhea

Postmenopausal female: none since already hypogonodal

Male syx: hypogonadism (low T), dec'd libido, impotence, infertility (low sperm count), gynecomastia, rarely galactorrhea
Pituitary adenoma:
Presentation
Treatment
Most commonly a prolactinoma

Presents w/features of hyperprolactinemia, also w/bilateral hemianopsia (tumor impinges on optic chiasm)

Tx: bromocriptine, cabergoline
Sheehan's Syndrome:
Pathophys
Presentation
Postpartum hypopituitarism due to inc'd risk of infarction

Fatigue
Anorexia
Poor lactation
Loss of pubic/axillary hair
(lack all of pituitary hormones!)
Acromegaly:
Pathophys
Presentation
Treatment
Excess GH

Large tongue, deep furrows
Indentions along tongue due to pressure of teeth against large tongue
Large hands, feet
Coarse facial features

Insulin resistance

Pituitary resection, octreotide
Somatostatin:
Produced by
Effects
Examples of analogues
Uses
Made by D cells in pancreas and GI tract

Effects: Dec'd splanchnic blood flow, dec'd GI motility and GB contraction, inhibits secreiton of most GI hormones

Uses:
Acromegaly, ACTH-secreting tumors (will dec endocrine/exocrine secretions in CNS/PNS)

Zollinger-Ellison syndrome, carcinoid syndrome, VIPoma, glucagonoma

Portal HTN

Ex: Octreotide, lamreotide
50 year-old female complains of double vision, amenorrhea, headaches.

Cause?
Prolactinoma suppressing optic chiasm
MRi reveals replacement of tissue in sella turcica with CSF.

Clinical presentation?
Empty Sella Syndrome (pituitary normally sits in sella)

No unusual presentation bc normally have some residual pituitary tissue, but sometimes have deficiency in one or more hormones.
What hormones arise from the anterior pituitary?
FSH
LH
ACTH
TSH
PL
GH
MSH
Which hormones share a common alpha-subunit?
TSH
LH
FSH
beta-hCG
PTH:
Stimulus for release
Released by
Effects
Hypocalcemia-->PTH release

Comes from parathyroid chief cells

F/X:
Inc'd renal absorption of calcium
Inhibits phosphate reabsorption (phosphate trashing hormone)
Inc'd production of 1,5-OH Vit D-->inc'd GI absorption of Ca2+

Directly stimulates oblasts, indirectly stimulates oclasts-->inc'd bone resorption

-->inc'd serum Ca2+
Vitamin D2 vs Vitamin D3:
Sources
What becomes of these?
Vitamin D2 from plants, Vitamin D3 from Sun

-->25-OH vitamin D in liver

-->1,25-OH2 vitamin D in kidney via 1-alpha-hydroxylase (activated by PTH)-->bone/GI tract
What non-parathyroid condition results in hypercalcemia?

How?
Sarcoidosis

Granulomas-->macs produce active vitamin D
Calcitonin:
Source
Embryonic origin
Function
Regulation
Source: parafollicular C cells of thyroid

Derived from NCC

Decreases bone resorption of calcium

High serum Ca2+ causes calcitonin secretion

CalciTONin TONes down Ca2+ levels
Hyperparathyroidism:
Primary vs Secondary vs Tertiary--
Pathophys
Lab values
Examples
Primary (Stones, bones, and groans): usually adenoma; hypercalcemia, hypercalciuria (renal stones), hypophosphatemia, often asyx, but may present with weakness and constipation (groans)

Ex: osteitis fibrosa cystica

Secondary: secondary hyperplasia due to dec'd gut Ca2+ absorption and inc'd phosphorus, most often in chronic renal disease (low active vitamin D)--HYPOCALCEMIA, hyperphosphatemia, high alk phos, high PTH

Ex: Renal osteodystrophy

Tertiary: refractory hyperpara; results from chornic renal dz; HIGH HIGH PTH, high Ca2+
Which diuretics result in increased urinary excretion of calcium?
Loops lose calcium
Thiazides don't (dec'd renal calcium stones)
Hypoparathyroidism:
Causes
Presentation
CAused by accidental surgical excision (thyroid sx), autoimmune destructions, or DiGeorge syndrome

Presentation:
Chvostek's sign--Tap cheek-->contraction of facial muscles

Trousseau's sign--occlusion of brachial artery with BP cuff-->carpal spasm
What is pseudohypoparathyroidism?
Albright's hereditary osteodystrophy--autosomal-dominant kidney unresponsiveness to PTH

leads to hypocalcemia, shortened 4th/5th digits, short stature

PTH WILL BE HIGH
What are the 3 functions of vitamin D?
Increases GI absorption of Ca2+
Increases GI absorption of PO4
Increases bone resorption of Ca2+ and PO4
How does PTH affect calcium?
Increases serum Ca2+
Increases renal absorption of Ca2+ at DCT
How does PTH affect phosphate?
Pulls PO4 from bone and excretes it in urine
What cells secrete calcitonin?
Parafollicular C Cells of thyroid
What are two signs of hypocalcemia?
Chvostek's (tap cheek)
Trousseau's (tighten cuff-->carpal spasm)
What are the two most common causes of primary hyperparathyroidism?
Solitary parathyroid adenoma or parathyroid hyperplasia
What is the underlying cause of renal osteodystrophy? How will serum Ca, Phos, Alk Phos, and PTH levels compare to normal levels?
Dec'd nephron loss

Phosphate elevated
Calcium low
PTH elevated
ALP elevated or normal
What agents can be used to treat osteoporosis?
Ca2+, vit D
Bisphosphonates***
Pulsatile PTH
Calcitonin
E2
Tamoxifen, raloxifene
T
In osteomalacia and Rickets, how will serum Ca, Phos, Alk Phos, PTH, urine Ca, and urine Phos compare to normal values?
Vitamin D Deficiency-->
Calcium low
PTH high
ALP increases as PTH increases
Phosphate low
Urine phsophate inc'd (kidneys still fnal!)
Urine calcium dec'd
Which hormones work via tyrosine kinase second messengers?
Insulin
IGF-1
PDGF
FGF
Prolactin
GH

(growth related!)
Which cancers are associated with hypercalcemia?
SquamousCC (anywhere)
Renal CC
Multiple myeloma
Breast Ca Mets
A young woman is found to have short stature and shortened 4th and 5th metacarpals.

Diagnosis?
Albright's hereditary osteodystrophy--pseudohypopara
What is the mechanism of action of bisphosphonates?
Inhibit oclast, simulate oblast (or just lets them stay fnal)
What are some possible causes of hypocalcemia?
Hypopara due to Thyroid Sx
Autoimmune disorder, DiGeorge Syndrome
T3/T4:
Sources of each
Function
Regulation
T4 formed by thyroid follicles
T3 formed in blood by peripheral conversion

T3 functions:
Brain maturation, bone growth, beta-adrenergic f/x (inc'd CO, HR, SV< contractility), inc'd Basal metabolic rate (inc'd Na/K/ATPase-->inc'd O2 consumption, body temp, RR)
Inc'd glycogenolysis, glucneo, lipolysis

Regulation:
TRH from hypothal stimulates TSH at pituitary; negative feedback by T3 to anterior pituitary
Extraocular muscle enlargement-->Graves' Disease
TBG:
Role
Binds free T3/T4 (inactive when bound)

Only unbound is active
Hypothyroidism vs Hyperthyroidism:
Symptoms
Lab findings
Hypothy:
Syx:
Cold intolerance
Weight gain, dec'd appetite
Hypoactivity
Constipation
Hyporeflexia

Labs: Inc'd TSH, dec'd T4, dec'd T3 uptake

Hyperthy:
Heat intolerance
Weight loss, inc'd appetite
Hyperactive
Diarrhea
Hyperreflex

Dec'd TSH (if primary), inc'd T4, inc'd T3 reuptake
Hashimoto's thyroiditis:
Pathophys
Presentation
Autoimmune thyroid disorder

Most common cause of hypothy (may start out as hyperthy though)
Hurthle cells:
What are they?
Pathognomonic of?
enlarged epithelial cells w/excess eosinophilic granules in cytoplasm

Seen in Hashimoto's thyroiditis
Cretinism:
Pathophys
Presentation
Fetal hypothy

May be due to iodine deficiency; defect in T4 formation (or failure to form thyroid)

Pot bellied, protuberant tongue, pale, puffy face, protruding umbilicus

MR
Subacute thyroiditis:
Pathophys
Presentation
Self-limited hypothy following flu-like illness

Hypothyroid
Riedel's thyroiditis:
Pathophys
Presentation
Thryoid replaced by fibrous tissue

Hypothyroide

Fixed, har, rock-like, painless goiter
Graves' Disease:
Pathophy
Presentation
Hypersens Rxn Type?
Autoimmune hyperthyroidism; due to ab's activating TSH receptor

Proptosis

TYPE II HYPERSENS (Ab mediated)
Thyroid storm:
What is it?
Causes
Treatment
aka thyrotoxicosis

Stress-induced catechol surge leading to death by arrhythmia; seen as serious complication of Graves' and other hyperthy disorders

Tx: Propranolol
Propylthiouracil:
MOA
Use
Inhibits iodination and coupling of thyroid hormone synthesis

Decreases peripheral conversion of T4 to T3

Use in hyperthy

LESS BIRTH DEFECTS, OKAY IN PREGNANCY
Methimazole
MOA
Use
Inhibits iodination and coupling of thyroid hormone synthesis

(NO EFFECT ON PERIPHERAL CONVERSION)

Use in hyperthy
Possibly a teratogen!!
Cause of hyperthyroidism:
Extremely tender thyroid gland
de Quervain's thyroiditis (subacute thyroiditis)
Cause of hyperthyroidism:
Pretibial myxedema
Graves'
Cause of hyperthyroidism:
Pride in recent weight loss, medical professional
Thyroid hormone abuse
Cause of hyperthyroidism:
Palpation of single thyroid nodule
Toxic thyroid adenoma
Cause of hyperthyroidism:
Palpation of multiple thyroid nodules
Toxic multinodular goiter
Cause of hyperthyroidism:
Recent study using IV contrast dye (iodine)
Jod-Basedow phenomenon--thyrotoxicosis if pt w/iodine deficiency goiter is made iodine replete
Cause of hyperthyroidism:
Proptosis, edema, injection
Graves'
Cause of hyperthyroidism:
History of thyroidectomy or radio-ablation of thyroid
Too much exogenous thyroid hormone
Most common form of thyroid cancer.

Histologic features?
Papillary carcinoma--excellent prognosis, ground glass nuclei (Orphan Annie)

Psammoma bodies, inc'd risk w/childhood irradiation
Papillary cancer of thyroid--note Orphan Annie nuclei
A 35 year-old female presents with diffuse goiter and hyperthyroidism.

What are her TSH and T4 levels like?
This is probably Graves

Low TSH
High T4
A 48 year-old woman has suffered from progressive lethargy and extreme sensitivity to cold.

Diagnosis?
Hypothy--Hashimoto's most common cause
Type of thyroid cancer:
Most common type of thyroid cancer (75%)
Papillary
Type of thyroid cancer:
Second most common type of thyroid cancer (10%)
Follicular
Type of thyroid cancer:
Activation of receptor tyrosine kinases
Papillary/Medullary
Type of thyroid cancer:
Hashimoto's thyroiditis is a risk factor
Lymphoma
Type of thyroid cancer:
Cancer arising from parafollicular C cells
Medullary
Type of thyroid cancer:
Commonly associated with either a RAS mutation or a PAX8-PPAR gamma1 rearragnement
Follicular
Type of thyroid cancer:
Commonly associated with rearrangements in RET oncogene or NTRK1
Papillary
Type of thyroid cancer:
Most common mutation in BRAF gene (serine/threonine kinase)
Papillary