The ability of the kidney to concentrate urine depends on
A. proximal convoluted tubule reabsorption.
B. a high medullary concentration gradient.
C. osmosis.
D. rapid removal of filtrate.
E. a low medullary concentration gradient.
B
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In general, polar molecules diffuse more rapidly across cell membranes than do nonpolar molecules.
Answer the following statement true (T) or false (F)
During the resting state of a voltage-gated Na+ channel,
1. the inactivation gate is open. 2. the activation gate is closed. 3. the channel is permeable to Na+. a) 1 only b) 2 only c) 3 only d) both 1 and 2 are true. e) all of these choices are true.
Found within both the periosteum and endosteum, _________ cells are derived from mesenchyme and serve as the stem cells of bone
Fill in the blank with correct word.
The formation of glycogen from glucose is called ________.
A. glycogenolysis B. glycolysis C. glycogenesis D. gluconeogenesis E. glucogenesis