Which of the following is NOT true of phospholipids?
A. They are amphipathic molecules.
B. They have a polar head and a nonpolar tail.
C. They are glycolipids originally isolated from the prostate gland.
D. They are major components of the cell membrane.
Answer: C
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The two organs that play an important role in maintaining acid-base balance are the
A) liver and gallbladder. B) liver and kidneys. C) heart and lungs. D) lungs and kidneys. E) heart and liver.
All of the epithelial surfaces are protected by antimicrobial peptides called:
a. interleukins b. interferons c. histamine granules d. defensins e. chemotactic factor
The plasma membrane
a. appears under an electron microscope as a double dark line with a light space between. b. is composed primarily of a double layer of phospholipid molecules with proteins interspersed throughout the phospholipids in a mosaic pattern. c. separates the intracellular and extracellular fluid. d. two of these answers. e. all of these answers.
What is the most common glial cell in the nervous system?
Most common glial cell in the CNS.