A neuron may receive multiple stimuli from the same sensory neuron over a very short period of time. The firing rate of the receiving neuron is proportional to the number of signals received from the sensory neuron
Which of the following is this an example of?
A. temporal summation
B. spatial summation
C. action potential
D. hyperpolarization
A
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Rank the elements carbon, phosphorus, calcium, and iodine in order of greatest abundance in living organisms
A. CPCaI B. ICaPC C. IPCCa
Which of the following is a benefit of recombination during meiosis in eukaryotes?
A. Branched intermediates aid in segregation by keeping the homologous chromosomes together. B. Crossing over can result from recombination, decreasing the combinations of alleles in each meiotic product. C. Recombination introduces mutations that lead to increased variation in the population. D. Recombination does not occur during meiosis. E. None of the choices given is correct.
The sugars found in nucleic acids consist of
A. 3 carbon atoms. B. 5 carbon atoms. C. 7 carbon atoms. D. 9 carbon atoms.
Lymphocytes that become part of cell-mediated immunity arm of the adaptive immune response develop in the:
A) intestine. B) bone marrow. C) spleen. D) lymph nodes. E) thymus.