Muscle/Skin/CT Flashcards
Which layer of the epidermis is connected by desmosomes?
stratum granulosum
What is another name for tight junctions?
zona occludens
What two proteins are contained in zona occludens?
claudins and occludins
What is the function of integrins?
maintain integrity of basement membrane
Integrins connect to which two proteins outside of cell?
collagen and laminin
What does cadherins stand for?
Ca2+ dependent adhesion proteins
What is the function of cadherins?
to connect adjacent cells cytoskeleton
Loss of what protein promotes metastasis?
E-cadherins
What is another name for desmosomes?
macula adherens
What disease targets desmosomes?
Pemphigus vulgaris
Nerve that cant open doors?
thoracodorsal
What is the purpose of the hemidesmosome?
connest keratin to underlying basement membrane
Where does one aim for a pudendal nerve block?
ischial spine
What nerve innervates the supraspinatus? Roots of this nerve?
suprascapular nerve
C5-C6
What nerve innervates the infraspinatus? Function?
suprascapular
lateral rotation
What nerve innervates the teres minor? Function?
axillary
external rotation and adduction
What nerve innervates the subscapularis? Function of subscapularis?
subscapular nerve
internal rotation of humerus
What are two causes of low ALP?
pernicious anemia and hypothyroidism
What is the cofactor for collagenase?
zinc
Dislocation of what carpal bone can lead to acute carpal tunnel syndrome?
lunate
What nerve runs over hamate? What canal?
ulnar
Guyon canal
What two roots are damaged during Erb’s Palsy?
C5/C6
What four muscles are damaged during Erbs Palsy?
Infra and supra spinatus
Deltoid
biceps
What roots are damaged during Klumpke’s Paralysis?
C8/T1
How does Klumpke’s Paralysis present?
claw hand
What are the functions of the lumbricals?
flex MCP
extend DIP and PIP
What are the roots of the axillary nerve?
C5/C6
Two examples the axillary nerve can become damaged?
surgical neck of humerus fractuce
anterior dislocation of humerus
What is the dermatome for the lateral forearm?
C5
Midshaft fracture of the humerus would damage what nerve?
radial
What nerve roots make up the radial nerve?
C5-T1
What nerve roots make up the musculocutaneous nerve?
C5-C7
What is required for maximum finger flexion strength?
wrist extension
What three muscles are innervated by the median nerve?
opponens pollcis
abductor pollicis brevis
flexor pollicis brevis
What are the nerve roots of the obturator nerve?
L2-L4
What are the nerve roots of the femoral nerve?
L2-L4
A pelvic fracture would damage what nerve? What two actions would be inhibited?
femoral
thigh extension and leg extension
What are the nerve roots of the common peroneal nerve?
L4-S2
What are the nerve roots of the tibial nerve?
L4-S3
What are the nerve roots for the sciatic nerve?
L4-S3
What are the nerve roots for the superior gluteal?
L4-S1
What are the nerve roots for the inferior gluteal?
L5-S2
Does the hip drop on the same side or opposite side as the lesion during a Trendelenberg sign?
opposite
Difficulty climbing stairs and rising from a seated position would be indicative of a lesion to what nerve?
inferior gluteal
Which nerve is responsible for extending the hip?
inferior gluteal
What artery runs in relation to the radial nerve of the posterior surface of the humerus?
deep brachial
What artery runs in relation to the axillary nerve?
posterior humeral circumflex
What artery runs with the long thoracic nerve?
lateral thoracic
What artery runs with the median nerve in the cubital fossa?
brachial artery
What artery is posterior to the medial malleolus?
posterior tibial
What receptor on skeletal muscle mediates calcium release?
ryanodine receptor
What receptor is coupled to the ryanodine receptor? What is the receptor sensitive to?
Dihydropyrridine
voltage
What protein covers the actin binding sites of myosin during on resting muscle?
tropomyosin
Which color are the slow twitch fibers? Type?
red
one
Which color are the fast twitch fibers? Type?
white
two
Which fiber hypertrophies during weight training?
white
What protein does cGMP activate?
MLCP
What cell line do osteoclasts differentiate from?
macrophages
What causes Osteitis Fibrosa Cystica?
hyperparathyroidism
What process fails during Achondroplasia?
Endochondral ossification
What receptor is implicated during Achondroplasia? What happens to this receptor?
FGFR3
constitutive activity
How does Achondroplasia most often arise?
Sporadically
What common factor is Achondroplasia associated with?
advanced paternal age
What other kind of inheritance can Achondroplasia display?
Autosomal Dominant
What does a DEXA score have to be in order to diagnose osteoporosis?
> -2.5
What is Type I osteoporosis?
descreased estrogen
What is Type II osteoporosis?
old age
What antibody targets the RANK Ligand?
Denosumab
What is the PGE1 Analogue?
Alprostadil
What cell is defective during Osteopetorsis?
osteoclasts
What enzyme is absent during osteopetrosis?
Carbonic anhydrase two
What is the hematological consequence of osteopetrosis?
pancytopenia
What is the treatment for osteopetrosis?
bone marrow transplant
What cell is hyperactive during Osteomalacia?
osteoblasts
What would be the only laboratory abnormality during Pagets Disease of Bone disease?
highly increased ALP
What cells are defective during Pagets Disease of Bone?
osteoclasts and osteoblasts
What two patterns are taken by Pagets Disease of Bone?
Mosaic and lamellar
Pagets Disease of Bone increases the risk of what cancer?
osteosarcoma
What does Pagets Disease of Bone do to the circulation?
high-output heart failure
What does Pagets Disease of Bone do to the head?
thickening of the calvarium
What is the most common site of Avascular necrosis? Due to what vessel?
femoral head
medial femoral circumflex
What two drugs can cause Avascular Necrosis?
steroids
high-dose corticosteroids
What modifiable risk factor can lead to Avascular Necrosis?
alcoholism
What genetic disease can cause Avascular Necrosis?
sickle cell
What would the levels of ALP be during Osteomalacia?
high
What would the levels of PTH be during Osteomalacia?
high
What are the levels of phosphate during osteomalacia?
low
Where in the bone does a Giant Cell Tumor arise?
epiphysis
What is the key phrase for Giant cell Tumor?
soap bubble
What type of cells are seen during a Giant Cell Tumor?
Multinucleated giant cell
How does an osteochondroma arise?
lateral projection of growth plate (metaphysis)
What bone tumor displays bimodal distribution?
osteosarcoma
What defective protein is associated with osteosarcoma?
p53
What disease can give rise to an osteosarcoma?
Pagets Disease of Bone
What bone cancer could be caused by radiation?
osteosarcoma
Sunburst appearance is indicative of what bone cancer? What causes this?
osteosarcoma
‘lifting of periosteum’
What part of the bone does Ewing Sarcoma arise in?
diaphysis
What is the population demographic for Ewing Sarcoma?
boys under the age of 15
Small blue cells means?
Ewing
“Onion skin” means?
Ewings
What is the translocation present during Ewings?
t(11:22)
What can an osteochondroma transform into?
chondrosarcoma
What type of immune reactions take place during Rheumatoid Arthritis?
three and four
What type of necrosis takes place in rheumatoid nodules?
fibrinoid
What is the HLA during rheumatoid?
HLA-DR4
What is the more specific antibody for rheumatoid?
anti-cyclic citrullinated antibody
What part of the skeleton is a chondrosarcoma located?
axial skeleton
Where in the bone is a chondrosarcoma located?
inside medullary cavity
What are two unusual presentation of rheumatoid arthritis?
pleuritis
pericarditis
What two glands are destroyed during Sjogren Syndrome?
lacrimal and salivary
What are the two auto-antibodies present during Sjogrens Syndrome?
anti-SS-A (Ro)
anti-SS-B (La)
What do the auto-antibodies target during Sjogrens?
anti-nuclear
Which gland can enlarge during Sjogrens?
parotid
What is Sicca Syndrome?
only dry eyes and dry mouth of Sjogrens
What are the three causes of MALT Lymphoma?
Sjogrens
Hashimoto
H. pylori
Which immune cells invade the gland during Sjogrens Syndrome?
lymphocytic
Why could Von Gierke disease produce gout?
lactic acidosis and lactate competes with urate for excretion
What color are gout crystals under parallel light?
yellow
What color are gout crystals under perpendicular light?
blue
Why does alcohol exacerbate gout?
alcohol metabolites competes with same transporter in the kidney for excretion
Which three drugs can be used in acute gout exacerbation?
indomethacin
colchicine
glucocorticoids
What two drugs can be used for gout prevention?
allopurinol and feboxostat
What is deposited during pseudo?
calcium pyrophosphate dihydrate
What is the shape of pseudogout crystals?
rhomboid
Which is birefringent, gout or pseudogout?
pseudogout
Which joint is clasically effected by pseudogout?
knee
What three diseases are associated with pseudogout?
hemochromatosis
hyperparathyroidism
hypoparathyroidism
What three drugs are used for pseudogout?
steroids
NSAIDs
colchicine
What are the three common bacteria for infectious arthritis?
Streptococcus
S. aureus
N. gonorrhoeae
What is ‘STD’ regarding Infectious Arthritis?
Synovitis of knee
Tenosynovitis of hand
Dermatitis
What does HLA-B27 code for?
MHC one
Which non-skeletal issues take place during Ankylosing Spondylti?
Uveitis
Aortitis
What four bugs can cause a GI infection what can lead to Reactive Arthritis?
Shigella/Salmonella
Campylobacter
Yersinia
What STD bug can lead to reactive arthritis?
Chlamydia
What race is more common to have SLE?
black
What nephritic syndrome does lupus present?
Diffuse Proliferative Glomerulonephritis
What nephrotic syndrome does lupus present?
membranous nephropathy