New York State Chemistry RegentsNew York State Earth Science Regents

 
Living Environment Regents August 2010 Question 20 PDF Print E-mail
Friday, 27 May 2011 12:57
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Correct answer: (1) delivery of sperm

Structure A refers to the vas deferens. During ejaculation, the sperm formed in the testes are propelled from the epididymis through the vas deferens, which are two ducts located from the scrotum around and behind the urinary bladder, where each joins a duct from the seminal vesicle.

Incorrect answers:

(2) production of gametes

The production of gametes occur in the male gonads or testes (testis, singular), which is composed of highly coiled tubes surrounded by several layers of connective tissue. In the illustration, the testis is the oblong-shaped structure where the vas deferens (structure A) is connected.

(3) production of hormones

The production of androgen, the principal male reproductive hormone, occurs in the testes (oblong-shaped structure at the bottom of the illustration, where structure A is attached), particularly in the interstitial cells of Leydig.

(4) excretion of urine

Urine excretion is not a function of the reproductive system. The organs, though, are interconnected because in males, urine and sperm both pass out through the urethra. However, structure A is not responsible for urine production. Urine is produced in the kidneys then passes through the urinary bladder, which is the large funnel-like structure in the upper part of the illustration.
 

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