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Difficulty: HardReproductive Systems and Processes in Organisms

Match each mammalian reproductive cell or gland with its primary physiological function.

  • Seminal vesiclesSecrete fructose-rich alkaline fluid supplying energy for sperm motility
  • Cowper's glandsSecrete mucus fluid to lubricate the urethra and neutralize acidic urine traces
  • Sertoli cellsNourish developing spermatids and establish the blood-testis barrier
  • Leydig cellsSynthesize and secrete testosterone in response to luteinizing hormone

Answer

Seminal vesicles match with secreting fructose-rich alkaline fluid supplying energy for sperm motility; Cowper's glands match with secreting mucus fluid to lubricate the urethra and neutralize acidic urine traces; Sertoli cells match with nourishing developing spermatids and establishing the blood-testis barrier; Leydig cells match with synthesizing and secreting testosterone in response to luteinizing hormone.
Seminal vesicles produce fructose-rich fluid powering sperm movement. Cowper's glands secrete pre-ejaculatory alkaline mucus neutralizing urethral acidity. Sertoli cells provide physical and nutritional support to developing gametes while forming the blood-testis barrier. Leydig cells produce testosterone under LH control.

Step-by-Step Solution

1
Identify the main function of accessory seminal vesicles.
Seminal vesicles produce fructose, prostaglandins, and alkaline fluid which nourish sperm and aid motility.
Sperm cells require carbohydrate substrates (fructose) for aerobic respiration to power flagellar movement.
2
Analyze the protective role of Cowper's (bulbourethral) glands.
Cowper's glands release a pre-ejaculatory clear fluid into the urethra.
This fluid neutralizes residual acidic urine in the shared urogenital tract prior to sperm passage.
3
Distinguish between intratubular Sertoli cells and interstitial Leydig cells in the testis.
Sertoli cells act as nurse cells forming tight junctions for the blood-testis barrier, while Leydig cells reside outside the tubules to synthesize testosterone.
Germ cells need immune privilege provided by Sertoli cells, while systemic male secondary traits and spermatogenesis maintenance depend on Leydig cell testosterone secretion.

Key Concept

Structure and function of male mammalian reproductive glands and testicular cells
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Topics

Reproductive Systems and Processes in Organisms

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