The optic tracts carry visual information from the retina to the
A) pulvinar nuclei.
B) lateral geniculate nuclei.
C) medial geniculate nuclei.
D) supraoptic nuclei.
E) paraventricular nuclei.
B
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The Snellen chart is a test for ________.
A. weight loss B. visual acuity C. neurological function D. color blindness
Surfactant is necessary to prevent collapse of the alveoli in the lung because in its absence, water molecules
A. are more strongly attracted to each other by van der Waals forces. B. congregate around nearby proteins to which they adhere. C. vaporize and take up much less space. D. are more strongly attracted to each other by cohesive forces.
When ________, blood flows passively into the atria and then passively into the ventricles.
A. the atria contract and the ventricles relax B. the atria relax and the ventricles contract C. both the atria and the ventricles relax D. both the atria and the ventricles contract
Which of the following events in the male sex act occurs last and results in ejaculation?
A. Release of secretions from the seminal vesicles and the prostate gland B. Contractions of skeletal muscle at the base of the penis C. Semen accumulates in the prostatic urethra D. Constriction of the internal sphincter of the urinary bladder E. Peristaltic contractions of the ductus deferens