ID: A . Each of the following is a duct in the male reproductive system 224. a.
ID: 3505989 • Letter: I
Question
ID: A . Each of the following is a duct in the male reproductive system 224. a. vas deferens. b. urethra. c. epididymis. d. inguinal canal. 225. The duct of the vas deferens is an extension of the: a. tail of the epididymis. b. urethra. c. ejaculatory duct d. seminal vesicles. The gland that secretes an alkaline substance that constitutes about 30% of the a. seminal vesicle. b. Cowper gland. c. bulbourethral gland. 226. seminal fluid is the: d. prostate gland. The main factor determining male fertility is the: a. size of the sperm. b. number of sperm ejaculated. 227. c. shape of the sperm. d. motility of the sperm 228. Sertoli cells is another name for a. interstitial cells. b. sustentacular cells. c. rete testis. d. tunica albuginea. Which of the following cells contain 46 chromosomes? a. Sperm cells b. Primary spermatocytes 229. d. Spermatids Which of the following is not true of FSH? 250.It is produced in the anterior pituitary gland. b. It increases the production of sperm. . It stimulates the secretion of testosterone. d. Its secretion is inhibited by high testosterone levels.Explanation / Answer
Ans.224. Option d . Is the correct option . Vas deferens , urethra and epididymis are the duct in the male reproductive system . Ingunail canal is not a duct but it only transfer the testes from the abdominal cavity to the lower part of body.The testes is connected to the abdominal cavity by the spermatic cord through the inguinal canal. It has no functional role in spermatogenesis.
Ans.225. Option A is the correct option. The duct of vas deferences is extension of the tail of the epididymis. Tail of epididymis is also called as thecauda epididymis. It is about 40 cm long. It passe over the urinary bladder and cuvres round the ureter and joins the duct of seminal vesicle to form the ejaculatory ducts.
Ans . 226 Option A. Seminal vesicle is the correct option. Seminal vesicle secrete yellowih colored ,slightly alkaline, viscous seminal fluid that also contain the fructose sugar. Fructose give the wnergy to the motile sperms.It does not store the sperm. Prostate gland produce the slightly acidic fluid thus it is not correct option.
Ans.227.option B is the correct option. The main factor which determine the male fertility is the no of sperm ejaculated . In many case no of sperm ejaculated get decreased . It is a sign of the infertility. So no of sperm ejaculated is a measure of male fertility.
Ans. 228.Option B is the correct option . Sertolli cells are also called as the sustentacular cell. Sertolli cells are responsible for the nursing of the developing sperm cell . The provide nutrition to them. They are present in the seminiferous tubule . So they help in the process of spermatogenesis.
Ans. 229. Option B is the correct option. Only primary spermatocyte are the diploid cell so the have 46 chromosome and all other cells spermatids,sperm cell and secondary spermatocyte are haploid in nature so the will have only 23 chromosome.
Ans 230.Option C is the correct option . FSH does not stimulate the secretion of testosterone. Instead testosterone production is stimulated by the LH hormone which is secreted by the leydig ' s cell. FSH is secreted by anterior lobe of pituatry gland , it increase the production of the sperm formation in the seminiferous tubules and its secretion is inhibited by the high testosterone level. In female it is responsible for the growth of follicles.