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
Answer: B
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Which of the following membranous structures is closest to the fetus?
A. The placenta B. The amnion C. The smooth chorion D. The villous chorion E. The placental sinus
During the down phase of a knee extension exercise, what role does the hamstring group play?
A. agonist B. antagonist C. stabilizer D. neutralizer
Answer the following statements true (T) or false (F)
1. The bony cochlea coils around a central hub, which is called the spiral ganglion. 2. The hair cells of the cochlear duct are found in the modiolus. 3. The cochlear duct is separated from the tympanic duct by the basilar membrane. 4. The membrane attached to the inner wall of the cochlear duct that causes the stereocilia of the hair cells to distort when it bounces up and down is the tectorial membrane. 5. The cell bodies of the sensory neurons that monitor the receptors in the cochlear duct are contained in the spiral ganglion.
The efferent arteriole of some juxtamedullary nephrons enters the renal medulla and becomes which of the following vessels?
A. interlobular artery B. arcuate artery C. vasa recta D. glomerular capillary E. interlobar artery