Over 99% of the water filtered through the glomerulus is reabsorbed. At which one of the following locations does most of this water reabsorption occur?
A) loop of Henle
B) distal tubule
C) collecting duct
D) proximal tubule
E) renal pelvis
D
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Which one of the following statements about integrins is correct?
A. Integrins indirectly connect microfilaments with the extracellular matrix. B. The integrins in animal cells are identical to the integrins in plant cells. C. There is a single type of integrin, capable of binding to multiple types of extracellular matrix proteins. D. Integrins are the primary cell adhesion molecule in a desmosome. E. Adjacent integrins create channels referred to as gap junctions.
Diffusion occurs because
A. Molecules constantly move and collide with each other B. Cellular energy forces molecules to collide with each other C. Molecules are attracted to one another D. Cellular energy pumps molecules across the cell membrane
Failure of the organs in the vestibular apparatus to function correctly can cause ____.
A. insensitivity to touch B. loss of hearing C. motion sickness D. inability to smell E. night blindness
Membrane rafts are found in the cytoplasmic membranes of
A) archaea only. B) bacteria only. C) eukaryotes only. D) both archaea and bacteria. E) both archaea and eukaryotes.