Once a sympathetic preganglionic axon reaches a trunk ganglion, it can do all but which one of the following?
A) synapse with a parasympathetic neuron in the same trunk ganglion
B) synapase with a ganglionic neuron in the same trunk ganglion
C) ascend or descend the trunk to synapse in another trunk ganglion
D) pass through the trunk ganglion without synapsing with another neuron
A) synapse with a parasympathetic neuron in the same trunk ganglion
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Which is FALSE about the equilibrium potential of a given ion across a membrane?
A. It is a function of the concentration of that ion on both sides of the membrane. B. It is the potential difference across the membrane at which an electric force favoring movement of the ion in one direction is equal in magnitude and opposite in direction to the diffusion force provided by the concentration difference of the ion across the membrane. C. It is the potential at which there is no net movement of that ion across the membrane. D. A permeable ion will move in the direction that will tend to bring the membrane potential toward that ion's equilibrium potential. E. An anion that is in higher concentration inside the cell than outside the cell will have a negative equilibrium potential.
The myelination of central and peripheral axons occurs rapidly through the first few years of life. How can this developmental process explain the improved motor abilities of infants and toddlers?
What will be an ideal response?
Under an electron microscope, the plasma membrane appears as a trilaminar structure consisting of two light layers separated by a dark middle layer
Indicate whether the statement is true or false
Intracellular fluid volume is normally what percent of body weight?
A. 60% B. 40% C. 20% D. 10% E. 5%