Sandwiched between the layer of circular and longitudinal muscle in the muscularis externa is the
A) mucosa.
B) submucosa.
C) muscularis mucosa.
D) myenteric plexus.
E) submucosal neural plexus.
D
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Which provide rapid transmission via myelinated fibers?
A) large C fibers B) small A delta fibers C) both of the above D) neither of the above
Messenger RNA
A. is synthesized when a portion of a DNA molecule is transcribed. B. directs the synthesis of DNA. C. is not involved in the synthesis of proteins. D. determines the sequence of nucleotides in the anticodons of tRNA. E. directs the synthesis of centrioles in the cytoplasm.
Olfactory receptors send axons through the cribriform plate. They synapse on neurons in the
A) medulla oblongata. B) medial geniculate. C) cerebral cortex. D) olfactory bulb. E) olfactory tract.
Gestation lasts about ________ days from the start of last menstruation.
A. 140 B. 20 C. 340 D. 280