Three discrete types of muscle fibers are identified on the basis of their size, speed, and endurance. Which of the following athletic endeavors best represents the use of red fibers?
A) a sprint by an Olympic runner
B) a long, relaxing swim
C) playing baseball or basketball
D) mountain climbing
B) a long, relaxing swim
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Blood in the pulmonary veins returns to which chamber of the heart?
A. Right atrium B. Right ventricle C. Left atrium D. Left ventricle E. Coronary sinus
Identify the organelle that provides enzymes for autolysis.
A. Peroxisomes B. Mitochondria C. Lysosomes D. Golgi apparatus E. Smooth ER
A 100 dB sound (loud) of 150 Hz (low pitch) would cause which of the following to occur?
A. The basilar membrane to vibrate slightly near its distal end B. The tectorial membrane to vibrate slightly near its distal end C. The basilar membrane to vibrate vigorously near its distal end D. The tectorial membrane to vibrate vigorously near its proximal end E. The basilar membrane to vibrate slightly near its proximal end
A functional group is best described as reoccurring clusters of
A) elements that occur in a salt and that can neither be hydrolyzed nor dehydrated. B) atoms that form the main reactive area for a particular compound. C) atoms that function in the body even if temperatures and pH reach extreme values. D) elements that form at high pH and who can successfully resist the action of buffers. E) amino acids in a globular protein such as hemoglobin, immunoglobulins, and albumins.