After leaving the testes, spermatozoa pass sequentially through the :
1. | seminiferous tubule, rete testis, efferent ductule, and epididymis |
2. | epididymis, ductus deferens, seminal vesicle, and ejaculatory duct |
3. | membranous urethra, prostatic urethra, and spongy urethra |
4. | epididymis, ductus deferens, ejaculatory duct, and urethra |
Identify the correct statement:
1. | GnRH stimulates the production of estrogen [in females] or testosterone [in males] directly |
2. | LH stimulates ovulation (female) or spermatogenesis (male) |
3. | FSH initiates and maintains the development of accessory sex organs (both sexes) |
4. | estrogen stimulates oogenesis (female only) |
What is the advantage of the descent of testes in humans from the lower abdomen to the scrotum?
1. | Better thermo-regulation leading to effective spermatogenesis |
2. | Ease of transport of the sperms to the urethra |
3. | More storage space for sperms |
4. | A decrease in the risk of prostatic hypertrophy |
Identify the correctly matched pair:
1. | cryptorchidism: failure of testes to descend into the scrotum |
2. | semen: largest contributor is prostate |
3. | puberty: stage of development before the reproductive organs become functional |
4. | primordial follicle: the first stage of meiosis for oogenesis |
In the hormonal regulation of the male reproductive system:
1. | Spermatogenesis starts due to a significant decrease in the secretion of GnRH |
2. | LH acts on Sertoli cells and stimulates the secretion of some factors required for effective spermiogenesis |
3. | FSH acts on Leydig cells and stimulates the synthesis and secretion of androgens |
4. | Androgens stimulate the process of spermatogenesis |
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): | hCG can also be used clinically to induce ovulation in the ovaries as well as testosterone production in the testes. |
Reason (R): | hCG resembles FSH in function. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
Study the given diagram and select the correct statement:
1. | A – sperms are stored and get matured here |
2. | B – contribute an insignificant amount to seminal plasma |
3. | C – their secretions are acidic in nature |
4. | D – add fructose to the seminal plasma |