Neurons have extremely long cytoplasmic extensions. Their chemical signals are produced in one portion of the cell, but released from a distant location. How are the chemicals transported?
A. On myosin filaments
B. On intermediate filaments
C. On the Golgi apparatus
D. Via lysosomes
E. On microtubules
Answer: E
Anatomy & Physiology
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Most of the middle layer in the heart wall is composed of
A) cardiac muscle cells. B) chondrocytes. C) epithelial cells. D) fibrocytes. E) smooth muscle cells.
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Gaps or interruptions in the myelin sheath are called
A. internodes. B. tight junctions. C. neurofilaments. D. nodes of Ranvier. E. gap junctions.
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Usually more than one sperm can successfully enter an ovum.
Answer the following statement true (T) or false (F)
Anatomy & Physiology