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

Biology & Microbiology

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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

Biology & Microbiology

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

Biology & Microbiology

Birds are most closely related to

A. crocodiles. B. snakes. C. mammals. D. non-avian dinosaurs. E. amphibians.

Biology & Microbiology

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

Biology & Microbiology