Question 1

Meiosis II occurs in the&#10;A) Primary spermatocyte&#10;B) Secondary spermatocyte&#10;C) Spermatid&#10;D) Spermatogonia&#10;E) Spermatozoa

Accepted Answer

Meiosis II occurs in the secondary spermatocyte, which is produced after the first meiotic division of the primary spermatocyte. Meiosis II results in the formation of four haploid spermatids, which then differentiate into spermatozoa. However, as listed above, spermatozoa are not directly involved in meiosis.

Question 2

The substage of prophase of meiosis I in which synapsis begins is the _____ substage.&#10;A) Diakinesis&#10;B) Diplotene&#10;C) Leptotene&#10;D) Pachytene&#10;E) Zygotene

Accepted Answer

Zygotene is the substage of prophase of meiosis I in which synapsis begins.

Question 3

Spermatogenic cells and Sertoli cells are found in the&#10;A) Epididymides&#10;B) Prostate&#10;C) Rete testes&#10;D) Seminiferous tubules&#10;E) Vas deferens

Accepted Answer

Spermatogenic cells (sperm precursor cells) and Sertoli cells (support cells) are found in the seminiferous tubules of the testes, which are responsible for the production of sperm. The epididymides are located at the back of each testicle and are responsible for the storage and maturation of sperm. The prostate gland and vas deferens are part of the male reproductive system, but they do not contain spermatogenic cells or Sertoli cells. The rete testes are a network of tubes that connect the seminiferous tubules to the epididymides, but they do not contain these cells either.

Question 4

Testosterone is secreted by&#10;A) Leydig cells&#10;B) Principal cells&#10;C) Sertoli cells&#10;D) Spermatogenic cells&#10;E) Spermatogonia

Accepted Answer

Testosterone is secreted by Leydig cells in the testes.

Question 5

During which phase of spermiogenesis does the manchette develop?&#10;A) Acrosomal phase&#10;B) Cap phase&#10;C) Golgi phase&#10;D) Maturation phase&#10;E) Spermatid rotation phase

Accepted Answer

The manchette develops during the acrosomal phase of spermiogenesis. This phase is characterized by the formation of the acrosome and the development of the manchette, which is a transient microtubular structure involved in shaping the sperm head and aiding in the elongation of the spermatid.

Question 6

Which of the following are diploid structures?&#10;A) Primary spermatocytes&#10;B) Secondary spermatocytes&#10;C) Sperm&#10;D) Spermatids&#10;E) Spermatozoa

Accepted Answer

Primary spermatocytes are diploid cells that undergo meiosis to form haploid secondary spermatocytes.

Question 7

Which of the following is not true of Sertoli cells?&#10;A) Their function is regulated by follicle-stimulating hormone&#10;B) They are found in testicular interstitial tissue&#10;C) They prevent cytotoxic agents from moving to the seminiferous tubules from the blood by forming tight junctions with adjacent Sertoli cells&#10;D) They provide mechanical support for spermatogenic cells&#10;E) They provide nutrition for spermatogenic cells

Accepted Answer

Sertoli cells are found within the seminiferous tubules of the testes, not in the interstitial tissue.

Question 8

Diploid spermatogenic cells in direct contact with the basal lamina are&#10;A) Sertoli cells&#10;B) Spermatocytes&#10;C) Spermatogenic cells&#10;D) Spermatogonia&#10;E) Spermatozoa

Accepted Answer

Spermatogonia are the diploid spermatogenic cells that line the basement membrane in the seminiferous tubules, in direct contact with the basal lamina.

Deck 20: Spermatogenesis