Neurotransmitters that open Na+ channels and trigger action potentials in receiving cells are called

A) inhibitory.
B) excitatory.
C) sympathetic.
D) parasympathetic.


Answer: B

Biology & Microbiology

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The processes of transcription and translation are collectively known as

A. RNA processing. B. gene duplication. C. protein synthesis. D. DNA synthesis. E. gene expression.

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Why must mosses live in moist environments?

A. Because they depend on water to reproduce B. Because they are pollinated by fish and aquatic insects C. Because they grow as a mat D. Because they lack a waxy outer layer

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Movement of sister chromatids back and forth during prometaphase is known as ________

Fill in the blank with correct word.

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  Figure 33.17 ? Use the accompanying figure to answer the following question.   The structure that protects the eyeball is indicated by the letter ____.

A. A B. B C. C D. D E. E

Biology & Microbiology