A reflex pathway is the simplest pathway because it _____
a. involves only one synapse
b. is evaluated and integrated by the medulla, not the cerebrum
c. does not involve conscious thought or learning
d. does not involve the central nervous system in any way
e. involves only one neurotransmitter
ANSWER: c
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The figure below illustrates that
A. genetic changes in an ancestral Pax6 gene contributed to the evolution of the mammal eye, while the Drosphilia eye arose independently.
B. most animal species have eyes with one photoreceptor and one pigment cell.
C. eye complexity has not significantly increased since the late Triassic when most modern insect families arose.
D. the retina and cornea developed first, but then were secondarily lost in insects such as Drosphilia.
E. although the mammal eye possesses more cell types and greater complexity than the Drosphilia eye, both arose from genetic changes to an ancestral Pax6 gene.
Why is it so difficult to identify the beginnings of the hominin line? What will be an ideal response?
Studies of CNVs (copy number variations) reveal that schizophrenia and autism may be
______________. A. the same disorder D. linked to bipolar disorder B. opposite faces of the same disorder E. X-linked dominant disorders C. always inherited together
The major organelle involved in the detoxification of alcohol is the peroxisome
Indicate whether the statement is true or false