Epidermolysis bullosa is a rare genetic disorder:
A. of a keratin gene that disrupts intermediate
filaments, weakening epidermal cell
connections.
B. of a microfilament gene that disrupts
desmosomes, weakening epidermal cell
connections.
C. of an intermediate filament gene that
disrupts hemidesmosomes, weakening
epidermal cell connections.
D. of a keratin gene that disrupts
microfilaments, weakening epidermal cell
connections.
E. All of these choices are correct.
A
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The changeover in production from IgM to IgG by an activated B cell is called a ________ event.
Fill in the blank(s) with the appropriate word(s).
Bone plays a critical role in providing ____ for the blood
a. sodium and calcium ions b. magnesium and phosphate ions c. carbon dioxide d. phosphate and calcium ions e. calcium ions and oxygen
The direct yield of ATP from the electron transport system is:
1.2 2.8 3.32 4.36 5.48
Trace the flow of urine through the following structures
1) bladder 2) renal papilla 3) ureter 4) renal pelvis 5) urethra a. 4 ? 2 ? 5 ? 1 ? 3 b. 1 ? 2 ? 4 ? 3 ? 5 c. 2 ? 4 ? 3 ? 1 ? 5 d. 2 ? 1 ? 4 ? 3 ? 5 e. 4 ? 1 ? 2 ? 3 ? 5