BSCS Biology: A Molecular Approach

Chapter 21: Nervous Systems

Cellular Communication

1.
The difference between a negative charge (as within a cell) and a positive charge (outside it), produces ____, a form of energy.
A)stimulus
B)synapse
C)electric potential
D)threshold
2.
Chemical messengers that deliver nerve impulses between cells are called.
A)neurotransmitters
B)synapses
C)thresholds
D)electric potentials
3.
The spiderweb on the right was spun by a spider under the influence of ____.
<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078664276/281029/ccq_ch21_q3b.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (13.0K)</a>
A)caffeine
B)alcohol
C)amphetamines
D)sunlight
4.
Investigators have found that people with Alzheimer's disease produce less ___ than people without the disease.
A)serotonin
B)dopamine
C)acetylcholine
D)plasma
5.
A ____ is an involuntary response to a stimulus.
A)neuron
B)meninges
C)threshold
D)reflex
Glencoe Online Learning CenterScience HomeProduct InfoSite MapContact Us

The McGraw-Hill CompaniesGlencoe

Please read our Terms of Use and Privacy Policy before you explore our Web site. To report a technical problem with this Web site, please contact the Web Producer.