Sarin nerve gas paralyzes muscle by interfering with neuronal transmission by which of the following?
A) serotonin
B) GABA
C) acetylcholine
D) encephalin
E) glutamate
Answer: C
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Where do the light-dependent reactions take place?
a. stroma b. intermembrane space c. thylakoid membrane d. thylakoid lumen
Four of the five indicate that evolution by natural selection is a plausible mechanism leading to the
diversity of species that have and do exist. Select the exception.
a. artificial selection b. Darwin's finches c. insect resistance to pesticides d. a parent's traits developed through life are passed on to offspring via natural selection e. biogeographical patterns in species
Inhaled air has a higher partial pressure of oxygen than blood in pulmonary capillaries. Therefore, oxygen ____
a. dissociates from hemoglobin b. diffuses out of the blood, into the air c. diffuses into the blood from the air d. moves out of the lungs during exhalation e. does not cross the respiratory membrane
Most of the carbon dioxide in the blood is transported:a
by being dissolved in plasma. b. as bicarbonate ions. c. by hemoglobin. d. as carbonic anhydrase. e. as carbonic acid.