A stronger stimulus results in which one of the following?
A) larger action potentials
B) greater frequency of action potentials
C) action potentials that travel more quickly
D) activation of more receptors and initiation of more action potentials
E) neural fatigue
D
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Approximately how much "dead" air remains in the airways between breaths?
a. 150 milliliters b. 500 milliliters c. 25 milliliters d. 300 milliliters e. 0 milliliters
Injecting DNA into cells can be accomplished using
A. nitrocellulose membranes. B. silicon chips and nucleic acids. C. compressed air and gold beads. D. micropipettes. E. micropipettes, or compressed air and gold beads.
Answer the question using the accompanying figure. Identify the developmental brain region that gives rise to the
a. hindbrain b. midbrain c. telencephalon d. medulla e. forebrain
Prokaryotes
a. have membrane-bound organelles that are important in cell respiration and phtosynthesis b. sometimes have folded internal membranes that are important in cell respiration and photosynthesis c. have ribosomes but never have any kind of internal membranes within their cell d. do not have ribosomes or any kind of internal membranes e. have a genome that is bigger than is typical for eukaryotes, especially if plastids are included in the gene count