The simultaneous processing of information on many parallel tracks is most closely associated with:
A) a REM rebound
B) sleep apnea
C) narcolepsy
D) unconscious mental activity
Answer: D) unconscious mental activity
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The best models to use in studying surface anatomy include
A) babies and children. B) elderly individuals. C) individuals with well-developed muscles and little body fat. D) extremely slender individuals who have little body fat. E) plastic models from the laboratory.
Considering the left ventricle, why does isovolumetric ventricular contraction occur during ventricular systole?
A) The ventricle needs to pressurize the blood to close the aortic valve. B) Ventricular pressure is greater than atrial pressure so the ventricle cannot eject blood. C) The bicuspid valve needs time to shut before the ventricle can eject blood. D) Aortic pressure is higher than ventricular pressure and the ventricle must pressurize the blood to open the aortic valve. E) The ventricle is still filling with blood and therefore cannot eject blood during this time.
Which of the following statements concerning the ankle joint is true?
A. It is a pivot joint. B. The lateral collateral ligament helps to stabilize this joint. C. The calcaneus articulates with the tibia to form this joint. D. A capsule of hyaline cartilage surrounds the joint. E. Most common injuries to this joint occur because of a forceful inversion of the foot.
What structure in a muscle fiber acts as a calcium reservoir or storage site?
a. Sarcoplasmic reticulum b. Sarcoplasm c. Myofibrils d. Transverse tubules