This figure shows a lymph node and its components. The region indicated by number 1 is a
A. cortical sinus.
B. medullary sinus.
C. mantle zone.
D. medullary cord.
E. germinal center.
Answer: E
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Tri-iodothyronine and tetraiodothyronine are produced by the C-cells of the thyroid gland
Indicate whether the statement is true or false
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What will be an ideal response?
Which statement is false regarding mineral deposition in bone?
A. Osteoblasts produce the bone's hydroxyapatite crystals. B. Calcium phosphate circulates through the blood and other bodily fluids. C. Osteoblasts allow hydroxyapatite crystals to be deposited. D. Osteoblasts produce the collagen fibers of bone.