（）is a translucent gelatinous substance between the cell membrane and the nucleus
A. cell wall
B. Cytoplasm
C. mitochondrion
D. endoplasmic reticulum
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The epithelial types distributed on the surface of gastric and intestinal mucosa are（）
A. stratified squamous epithelium
B. transitional epithelium
C. single-layer columnar epithelium
D. pseudostratified columnar ciliated epithelium
Neurons including（）
A. sensory neuron
B. motor neuron
C. contact neuron
D. conduction neuron
The type of epithelium distributed in the tracheal mucosa is（）
A. single-layer cubic epithelium
B. single-layer columnar epithelium
C. simple squamous epithelium
D. pseudostratified columnar ciliated epithelium
The basic life phenomena of cells include（）
A. cell proliferation
B. metabolism
C. induction
D. cell movement
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