Layers of bony matrix at the outer and inner surfaces of bone and covered by the periosteum and the endosteum are
A) concentric lamellae.
B) osteons.
C) Haversian systems.
D) interstitial lamellae.
E) circumferential lamellae.
E
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Receptor-mediated endocytosis
A) is a type of secretion. B) imports target molecules after they bind to membrane proteins. C) does not require energy from the cell. D) can only move a substance down its concentration gradient. E) imports extracellular fluid, including all of its dissolved molecules.
The ________, or chin, tends to be more pointed in females and more "squared-off " in males.
Fill in the blank(s) with the appropriate word(s).
Which protein does NOT belong in a thin filament?
A) myosin B) tropomyosin C) troponin D) actin
The greatest outflow from the dural venous sinuses is via the internal jugular vein.
Answer the following statement true (T) or false (F)