Multiple sensory receptors can synapse on a single neuron. The receiving neuron has a firing rate proportional to the number of signals received. Which of the following is this an example of?
A. temporal summation
B. spatial summation
C. action potential
D. hyperpolarization
B
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Sam was in a terrible head-on collision. When he recovered from all of the obvious, external injuries, the once affable and happy-go-lucky person had become surly and very unfriendly. Which part of his cerebrum was most likely damaged?
A) prefrontal cortex B) Broca's area C) thalamus D) postcentral gyrus
Which one of the following enables T helper cells to stimulate and activate other cells of the immune response?
A) interferon B) cytokines C) antibodies D) complement E) histamine
The pectoral girdle is adapted for great strength, whereas the pelvic girdle is more adapted for flexibility.
Answer the following statement true (T) or false (F)
What mode of transmission increases, stabilizes, then decreases?
A. Water B. Fomite C. Droplet D. Parenteral E. Biological vector