Which cells form myelin in the spinal cord?
A. Microglia
B. Oligodendrocytes
C. Astrocytes
D. Schwann cells
E. Satellite cells
Answer: B
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In the diagram, which one represents carrier-mediated facilitated diffusion?
a) A b) B c) C d) Both A and C e) Both B and C
Which statement regarding the hila of the lungs is not true?
A. The right hilum is slightly superior to the left. B. The hila are found on the medial lungs. C. The roots of the lungs enter and exit the hila of the lungs. D. None of the above statements is true. E. All of the above statements are true.
A muscle fiber is
A. synonymous with a muscle cell. B. an elongated series of muscles held together by dense connective tissue. C. a collection of several muscles bound together by a membrane. D. found only in cardiac muscle. E. unable to transmit a signal from one fiber to another.
Smooth muscle cells are interconnected by gap junctions found in intercalated discs that join cells together
a. True b. False Indicate whether the statement is true or false