Fatty acids enter the cell respiration pathway at
A. the citric acid cycle, once they have been converted to acetyl CoA.
B. glycolysis, once they have been converted to glucose.
C. electron transport chain, once they have been converted to NADH.
D. the intermediate stage, once they have been converted to pyruvate.
A
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The secretion rates of many endocrine hormones rhythmically fluctuate up and down as a function of time, which is referred to as their:
a. circadian rhythm b. luminosity c. day cycle d. light rhythm e. night cycle
An increase in the volume of the thoracic cavity ________ the intra-alveolar pressure, which causes ________.
A. increases; inspiration B. decreases; expiration C. decreases; inspiration D. increases; expiration
Unlike chemical synapses, electrical synapses ________.
A. provide adjacent cells with the ability to act in a coordinated fashion B. allow communication between cells with larger distances between the membranes C. are the method of connection between adjacent neurons D. are not dependent on the movement of ions across a plasma membrane
Concentric contractions occur when
A. the muscle produces increasing tension as it shortens. B. the tension and length of the muscle remain constant during a contraction. C. tension in a muscle is maintained while the muscle increases in length. D. the muscle produces tension while the length of the muscle increases. E. isometric contractions occur.