Recalls 9 Flashcards
Most common branch missing from IIA
Middle rectal
Where is the aortic bifurcation in relation to the bony landmarks
Tip of iliac crests. Think epidural
When do the external genitalia start to differentiate
Week 7, this is when the Y chromosome is expressed.
Where do lacunae form in the placenta
In the syncytiotrophoblast.
The lacunae end up being the space where amteral-fetal exxchnage occurs. They will with maternal blood. The cells around the lacunae penetrate into the uterus and will make the villous trees
What gestation does the anterior pituitary develop?
Develops from rathke’s pouch by 5th week
OVERVIEW OF BRAIN DEVELOPMENT
The notocord sits under the ectoderm and releases growth factors. This causes the ectoderm to form a plate which has ectoderm on the peripheries and a neural plate in the middle.
This continues to expand and bends upwards. This creates the neural folds, the neural crest and ultimately the neural tube.
The top portion of the neural tube forms the brain
The bottom portion of the neurla tube forms the spinal cord
Brain vesicles
Prosencephalon - forebrain
Mesencephalon - midbrain
Rhombencephalon - hindbrain
What do each of the brain vesicles give rise to
Prosencephalon - forebrain - telencephalon (cerebral hemispheres), diencephalon (thalamus/hypothalamus)
Mesencephalon - midbrain - midbrain
Rhombencephalon - hindbrain - metencephlon (pons/cerebellum) myelincephalon (medulla)
Which enzyme catalyses the first stage of the urea cycle
Where does the urea cycle take place
What is the purpose of the urea cycle
Carbonyl Phosphate Synthetase
Liver
When our bodies break down amino acids they produce ammonia which is TOXIC. Therefore the liver enzymes turn this into urea and excrete it via urine
How does fibronectin work
Binds to integrin and helps cells stick together
Where do prostaglandins get deactivated
Lungs mainly
also liver and kidney
Describe the production and storage of surfactant
Made in type 2 pneumocytes in the lungs.
Produced by endoplasmic reticulum.
Processed by golgi
Sorted in lamellar bodies
Which cells are responsible for wound remodelling
Myofibroblasts
When do HCG levels peak in pregnancy
10-12 weeks
When does HPL plateau during pregnancy
36 weeks
When does production of HbA start????
DONT KNOW
