Nodes of Ranvier are intervals between Schwann cells that the conduction of nerve impulses.
A. slow down
B. have no effect on
C. initiate
D. speed up
E. completely block
D. speed up
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Imagine that a young girl suffers a horseback-riding injury, and one of her ribs punctures her diaphragm. How will this injury affect the girl's breathing? Select all correct choices
A. The injury will make it easier to increase negative air pressure in her chest cavity, making inhalation easier. B. The injury will make it more difficult to increase negative air pressure in her chest cavity, making inhalation more difficult. C. The injury will make it more difficult to decrease negative air pressure in her chest cavity, making inhalation more difficult. D. The injury will not affect her at all, as intercostal muscles are responsible for breathing
Some amoebae have a covering over their plasma membrane. These amoebae are referred to as ________ amoebae.
Fill in the blank(s) with the appropriate word(s).
At low population density, __________ is favored, quickly producing as many offspring as possible. Fill in the blank(s) with the appropriate word(s)
Fire and Mello studied the effect of RNAs made from plasmids on gene expression in the nematode C. elegans. The results from the two experimental treatments and the control are shown below. What can be concluded from these results?
A. The labeled probe detects RNAs other than mex-3. B. Double-stranded RNA degrades more mex-3 mRNA than antisense RNA. C. The injection procedure results in degradation of all mex-3 mRNA. D. Antisense RNA degrades more mex-3 mRNA than double-stranded RNA.