In temporal summation, a single presynaptic neuron stimulates the creation of action potentials in a postsynaptic neuron when it
a) stops firing long enough to allow the postsynaptic neuron to recover.
b) fires at a fast enough rate that the sum of EPSPs in the postsynaptic neuron moves above threshold.
c) fires at a steady rate that allows the postsynaptic neuron to return to resting potential.
d) recruits other presynaptic neurons to begin to fire.
e) runs out of neurotransmitter.
b
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Which of the following is NOT a B cell problem in aging?
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In the cat, the head is ________ to the tail. In the human, the head is ________ to the gluteal region (buttock)
A) ventral; distal B) posterior; dorsal C) superior; superior D) anterior; posterior E) anterior; superior
Diets high in cholesterol and saturated fats tend to produce high HDL concentrations
Indicate whether the statement is true or false