4) chemical reactions that yield energy, such as heat, are said to be
a) endergonic.
b) activated.
c) exergonic.
d) neutral.
e) thermonuclear.
5) differentiation among blastomeres is the result of
a) enzymes introduced by the sperm.
b) hormones produced by the ovum.
c) an unequal distribution of regulatory molecules in the cytoplasm of the ovum.
d) regulator molecules supplied by cells of the uterus.
e) enzymes activated by the sperm.
6) what mental illness is often improved by drugs that block serotonin re-uptake?
a) agitation
b) hallucinations
c) depression
d) parkinson’s
e) huntington’s
7) after arousal by a sensory stimulus, consciousness can be maintained by positive
feedback, because of activity in the
a) cerebral cortex.
b) basal nuclei.
c) sensory pathways.
d) motor pathways.
e) all of the answers are correct.