Metabotropic receptors:
A. trigger EPSPs whose time course is mainly determined by the RC properties of the cell membrane
B. trigger EPSPs that last ~10 msec
C. are protein monomers that are coupled to a G protein
D. have only one significant action, which is to cause voltage changes (PSPs)
ANS: C
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Translation is a synonym for __________________ motion. ________________________________________
Fill in the blank(s) with the appropriate word(s).
At the threshold for generating an action potential:
A. the membrane is at the K+ equilibrium potential B. the conductances for Na+ and K+ are equal C. there is a rapid opening of voltage-gated Na+ channels D. K+ conductance is maximal E. the transmembrane voltage is zero
The stomach contains enteric pacemaker cells responsible for its regular churning motion and thus mechanical digestion.
Answer the following statement true (T) or false (F)
Why does the antibiotic streptomycin also affect a human's mitochondria?
A. Mitochondria have a double membrane similar to the nucleus. B. Mitochondrial DNA is similar to bacterial DNA. C. Streptomycin targets mitochondrial cristae. D. Mitochondrial enzymes are only found in bacteria.