Trace the pathway of sperm from the seminiferous tubules to the external urethral orifice of the penis
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Sperm are made in the seminiferous tubules of each testis. Seminiferous tubules are surrounded by myoid cells, which contract to push sperm and testicular fluids through the tubules and out of the testes. The seminiferous tubules of each lobule merge into a single straight tubule that moves sperm into the rete testis, a network of tubules on the posterior side of the testis. Sperm then pass through efferent ductules and enter the first portion of the duct system, the epididymis. After leaving the epididymis, the sperm continue traveling through a system of ducts: ductus deferens, ejaculatory duct, urethra (prostatic, membranous and spongy regions) and exit the body through the external urethral orifice.
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The two major subdivisions of the ECF are the
A) ICF and plasma. B) interstitial fluid and plasma. C) lymph and plasma. D) serous fluids and lymph. E) interstitial fluid and CSF.
In the myofibril the thin filament is organized around a rod-like core protein called
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The ________ method of birth control involves taking either combination estrogen/progesterone birth control pills or progesterone-only pills in two large doses 12 hours apart within 72 hours of unprotected sexual intercourse
A) oral contraceptive B) progesterone-only C) intrauterine device D) rhythm method E) hormonal post-coital contraception
If one is suffering from depression and anxiety, one's doctor might prescribe ________________. Select one:
a. albuterol b. vitorin c. zoloft d. humira