true or false? An enzyme speeds up a chemical reaction in the cell, but can only be used once.
a. true
b. false
b. false
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Pleural membranes envelop organs within the thoracic cavity.
Answer the following statement true (T) or false (F)
If acetylcholine binds to muscarinic receptors,
A. G proteins mediate the cell's response. B. Ca2+ channels open. C. Na+ channels open. D. the response is neither excitatory nor inhibitory. E. adrenaline is released.
In DNA replication,
A. only introns are replicated. B. DNA polymerase splices the short segments of the lagging strand together. C. the leading strand is formed as a continuous strand. D. new nucleotides are added at the 5' end of the growing DNA strand. E. the two existing strands are not used as templates.
The thoracolumbar division is another name for the ________ division of the ANS.
Fill in the blank(s) with the appropriate word(s).