Which region includes B cells, follicular dendritic cells and macrophages?
a) B
b) C
c) D
d) E
e) F
b
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The production of leukocytes is called _______________
Fill in the blank with correct word.
Which of the following is TRUE about the concentration gradient of Na+ in a neuron at rest?
A. It is in the same direction as the diffusion potential due to the concentration gradient for K+. B. It favors movement of Na+ in the opposite direction as the electrical potential acting on Na+ at the resting membrane potential. C. It favors its movement into the cell at the resting membrane potential. D. It favors its movement out of the cell at the resting membrane potential. E. It is equal and opposite to the electrical potential acting on Na+ at the resting membrane potential.
The lungs are located in the
a. thoracic cavity b. mediastinum c. dorsal cavity d. both B and C above
In which nervous system does the synapse of the preganglionic and postganglionic neurons usually occur close to the spinal cord?
a. parasympathetic nervous system b. sympathetic nervous system c. both the parasympathetic and sympathetic nervous systems