Which of the following contains a crystalline form of calcium phosphate and is the hardest biologically manufactured substance?
A) enamel
B) cementum
C) dentin
D) pulp
E) periodontium
A) enamel
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What are the primary genitalia in a male?
A) Ureter B) Epididymis C) Seminal vesicles D) Testes
The main regulator of the release of gonadotropins from the anterior pituitary is
A) Aromatase. B) GnRH. C) CG. D) LH.
Without the positive selection process in lymphocyte maturation ________
A) NK cells would be non-functional B) monocytes would not be able to migrate into infected tissue and differentiate into macrophages C) T-cells would not be able to properly bind to APC's and therefore not be activated by them D) autoimmune diseases would be likely to result
When a cell is at its resting membrane potential, more potassium diffuses out than sodium diffuses in.
Answer the following statement true (T) or false (F)