About 80% of the human skeleton is replaced yearly as a result of bone remodeling.
Answer the following statement true (T) or false (F)
False
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One function of epithelial cells is to form selective barriers regulating exchange of materials across them.
Answer the following statement true (T) or false (F)
Urine leaves the renal pelvis and enters the ureter because of
A) contractions of the muscular layers of the renal capsule, which squeeze the kidney. B) opening of valves into the entrance of the ureters, which permits urine to flow through them passively. C) peristalsis of the ureters. D) gravity. E) All of the answers are correct.
Sexually transmitted diseases are only transmitted via oral sex.
Answer the following statement true (T) or false (F)
Nails are formed by the _____ layer.?
A) ?epidermal B) ?dermal C) ?hypodermal D) ?subcutaneous