The proximal convoluted tubule is
A. lined with epithelial cells that lack microvilli.
B. the site of glucose and amino acid reabsorption.
C. permeable to water if ADH is present.
D. impermeable to water.
E. the site of water secretion.
B
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The term for going backward is ________________
Fill in the blank(s) with correct word
Slow-oxidative fibers are type ____________________ fibers; fast glycolytic fibers are type ____________________ fibers; and fast, oxidative fibers are type ____________________ fibers
Fill in the blank(s) with correct word
The refractory period of cardiac muscle
a. lasts almost as long as the contraction period b. is much longer than the refractory period in skeletal muscle c. prevents tetanic contraction of the heart to occur to ensure smooth, coordinated ejection of blood from the ventricles d. is important for all of the above reasons e. is important for only reasons a and b
true or false? The three base sequence on the transfer RNA is the codon.
a. true b. false