The thin layers of neurons covering the mammalian brain and
which is most well developed increasingly in carnivores,
cetaceans, and primates, is termed the __________:
a. the cerebellum.
b. the thalamus.
c. the cerebral cortex.
d. the hippocampus.
e. the anterior commissure.
One explanation offered for the rapid expansion in the size,
mass, and volume of the mammalian brain, especially in those of
humans, is __________:
a. the cessation of apoptosis during embryonic brain
development.
b. an increased number of mitotic divisions of founder cells
in the proliferation phase.
c. the rapid division of mature neurons in the cerebellum
shortly after birth.
d. the expansion of the volume of the ventricles in adult
mammals.
Vesicles full of neurotransmitter are carried away from the
soma and toward the axon
terminal through the process of __________, while depleted
vesicles and those
containing re-absorbed neurotransmitter are carried toward the
soma through the process
of __________:
a. anterograde axoplasmic transport/retrograde axoplasmic
transport.
b. retrograde axoplasmic transport/anterograde axoplasmic
transport.
c. facilitative transport/passive transport.
d. endocellular cyclosis/exocellular cyclosis.
The small protuberances in the cortex of the mammalian brain
are termed __________, while the small grooves in between them are
termed __________:
a. gyri; sulci.
b. sulci; gyri.
c. projections; tracts.
d. hillocks; fissures.
The evolution of the __________ began with the mutation of a
sea squirt larva, which was maintained in a juvenile form even as
it became reproductively viable--a process termed
__________:
a. solid ventral nerve cord: pleiotropy.
b. hollow dorsal nerve cord: neoteny.
c. cortex: polygeny.
d. hypothalamus: proliferation.