Water may move through membrane pores constructed by transmembrane proteins called ________.
Fill in the blank(s) with the appropriate word(s).
aquaporins
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Which of the following statements is true concerning sonic muscles?
A) They contract at much higher frequencies than the locomotor muscles found in the same organism. B) They utilize completely different muscle proteins. C) They have a very slow rate of cross-bridge cycling. D) They are able to contract rapidly while producing large amounts of force.
The ____________________ system eliminates waste products other than carbon dioxide and plays a key role in regulating the volume, electrolyte composition, and acidity of the extracellular fluid
Fill in the blank(s) with correct word
What causes the heart valves to open and close?
a. action potentials in vagus nerve b. electrical connection with vagus nerve c. differences in blood pressure across the valve
Alex is participating in a 50-meter dash. Predict the most important chemical process his muscles will rely on during this race.
A. Both anaerobic respiration and creatine phosphate breakdown are correct. B. Anaerobic respiration C. Aerobic respiration D. Nuclear reactions E. Creatine phosphate breakdown