Collections of neuron cell bodies in the central nervous system are called
A) myelin.
B) axons.
C) dendrites.
D) nuclei.
Answer: D) nuclei.
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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.
Ingesting more salt would
a. increase the plasma's osmolarity b. make the plasma hypotonic to blood cells c. cause a decrease in vasopressin secretion d. cause a and b e. cause b and c
The biconcave cells in blood that lack nuclei when they are mature are the
A. macrophages. B. white blood cells. C. platelets. D. red blood cells.
An area of the skin supplied with sensory innervation is called a(n) _____.
a. plexus b. dermatome c. fascicle d. rami