Which of the following is NOT a type of glial cell found in the central nervous system?
a. oligodendrocytes
b. astrocytes
c. Schwann cells
d. ependymal cells
e. microglia
C
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Because of the active transport of Na+ and K+, the intracellular concentration of Na+ is lower than the extracellular concentration, whereas the reverse is true for K+.
Answer the following statement true (T) or false (F)
The zona fasciculata in the adrenal gland secretes ________.
A. cortisol B. estradiol C. glucagon D. epinephrine E. aldosterone
Which of the following pressures tends to force fluid from the glomerulus through the filtration membrane into Bowman's capsule?
A. tubular pressure B. capsular pressure C. colloid osmotic pressure D. glomerular capillary pressure E. None of these choices is correct.
Because of the presence of both activation and inactivation gates, voltage-gated Na+ channels can
a. be closed but capable of opening. b. activated. c. closed and not capable of opening. d. all of these answers. e. none of these answers.