What creates the osmotic gradient in the renal medulla?
A) special transport systems of the loops of Henle of juxtamedullary nephrons
B) active transport of solute out of the distal tubules and collecting ducts
C) special transport systems of the loops of Henle of cortical nephrons
D) active transport of solute out of the proximal tubule
E) passive transport of solute out of the distal tubules and collecting ducts
Answer: A) special transport systems of the loops of Henle of juxtamedullary nephrons
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A. palmar B. facial C. cardiac D. genitalia E. respiratory
Where does the chemical reaction between thyroglobulin and iodine take place?
A) in lysosomes B) in rough endoplasmic reticulum C) in the follicle cavity D) in pinocytotic vesicles E) in apical microvilli
Explain the primary difference between endochondral ossification and intramembranous ossification
A) The primary difference is that in endochondral ossification, bone develops from a cartilage model, whereas in intramembranous ossification, bone develops from mesenchymal cells. B) The primary difference is that in endochondral ossification, bone develops from mesenchymal cells, whereas in intramembranous ossification, bone develops from a cartilage model. C) The primary difference is that in endochondral ossification, bone develops fast, whereas in intramembranous ossification, bone develops slowly. D) The primary difference is that in endochondral ossification, bone develops slowly, whereas in intramembranous ossification, bone develops fast. E) The primary difference is that endochondral ossification is embryonic bone development, whereas intramembranous ossification is post-natal bone growth.
The brain and spinal cord are covered by the __________, composed of three membrane layers.
Fill in the blank(s) with the appropriate word(s).