Which term refers to the selective movement of specific small molecules and ions into excretory system tubules?
a. release
b. secretion
c. reabsorption
d. filtration
Ans: b. secretion
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What aspect(s) of a neuron are consistent in the diagram above (Fig. 35.5)?
A. the shape of the cell body nucleus B. the branching patterns of dendrites and axon terminals C. the presence of axons and dendrites D. the length of the axon E. the number of potential connections between that neuron and its neighbors
What part does carbon play in the structure of
biological molecules?
a. carbon forms their backbone b. carbon provides polarity c. carbon makes it easier for them to be digested d. carbon forms a bridge between two monomers e. carbon plays no role whatsoever in the structure of biological molecules
Birds are most closely related to
A. crocodiles. B. snakes. C. mammals. D. non-avian dinosaurs. E. amphibians.
You are testing a new chemotherapy drug that blocks a kinase in the cytoplasm that helps carry signals to the nucleus causing the cell to divide. If you expose cells to the drug at the same time you administer a hormone that should cause the cell to divide, which of the following steps would be blocked?
A. signal transduction B. activation of transcription factors C. receptor activation D. cell division