During forceful exhalation, the ____ muscles contract
a. diaphragm and abdominal
b. external intercostal
c. internal intercostal
d. diaphragm and external intercostal
e. diaphragm and internal intercostal
ANSWER: c
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Complete oxidation of glucose to CO2 involves two different mechanisms for synthesizing ATP, oxidative phosphorylation and substrate-level phosphorylation. Which is true of substrate-level phosphorylation?
A. An enzyme catalyzes the transfer of a phosphate group to ADP from an organic molecule to form ATP. B. Most of the ATP generated in cellular respiration is generated by substrate-level phosphorylation. C. ATP is generated indirectly through the transfer of high-energy electrons from electron carriers to an electron transport chain. D. ATP is generated by release of energy from the electron carriers NADH and FADH2.
The cartilaginous organ between the pharynx and the trachea, which contains the vocal cords in humans is called the ________.
Fill in the blank(s) with the appropriate word(s).
What evidence would support the hypothesis that larger cells evolved in part by engulfing other, smaller cells?
What will be an ideal response?
In the 1930s, the Navajo Nation treated sheep and cattle for ticks and other parasites by using concrete "dip tanks." Animals were herded through one end of the tank and out the other. Each day, the tanks were filled with 200,000 gallons of insecticide and any remaining chemicals were emptied onto the ground. The pesticide solution seeped into the ground, ditches, and pits around the tanks. This was a common practice in the United States during that period.