AP Biology (Mader), 11th Edition

Chapter 37: Neurons and Nervous Systems

Pre-Test

1
_______ refers to a concentration of neurons and sensory receptors in the anterior or head region.
A)Synaptic cleft
B)Action potential
C)Cephalization
D)Peripheral nervous system
2
Arthropods have a _____.
A)ventral nerve cord
B)dorsal nerve cord
C)nerve ladder
D)nerve net
3
All of the following are involved in maintaining the resting potential of an axonal membrane EXCEPT:
A)the Na+ - K+ pump.
B)large negatively charged proteins in the cytoplasm of the axon.
C)higher concentrations of Na+ inside the axon and higher concentrations of K+ outside the axon.
D)greater permeability of the membrane to K+ than Na+.
4
What organisms have the most highly evolved, complex nervous system?
A)Insects
B)Flatworms
C)Mammals
D)Fish
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