The two phyla of soft-bodied organisms, Cnidaria and Ctenophora, have bilateral symmetry and tissues
a. True
b. False
ANSWER: False
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Predict the expected consequence(s) of applying a toxin that blocks voltage-gated Ca2+ channels in a neuron.
A. No resting membrane potential would be observed (i.e., measures at 0 mV). B. A rapid increase in membrane potential at threshold voltage would not occur. C. Membrane potential would increase rapidly to peak with an action potential, but would not decrease immediately afterwards. D. The neuron would become hyperpolarized. E. Neuron conducts action potentials normally, but would not transmit these potentials across chemical synapses.
Planes maintain an atmospheric pressure equivalent to about 8,000 feet to sustain ____
a. a stable temperature b. oxygen levels c. oxygen availability d. oxygen levels and availability e. oxygen availability and reduce buildup of carbon dioxide
Define long-term potentiation
What will be an ideal response?
In a covalent bond, atoms
A. both become highly electronegative. B. share protons. C. share electrons. D. of opposite charges attract each other. E. lose electrons.