1. Where does spermatozoa formation primarily occur in the testis?
A.
Seminiferous tubules
B.
Epididymis
C.
Vas deferens
D.
Prostate gland
Correct Answer:
Seminiferous tubules
Explanation:
Spermatozoa are formed through spermatogenesis within the seminiferous tubules of the testes.
2. What is the process of formation of spermatozoa called?
A.
Oogenesis
B.
Spermatogenesis
C.
Fertilization
D.
Ovulation
Correct Answer:
Spermatogenesis
Explanation:
Spermatogenesis is the process by which male germ cells develop into mature spermatozoa.
3. Which cells in the seminiferous tubules develop into spermatozoa?
A.
Germ cells
B.
Leydig cells
C.
Red blood cells
D.
Muscle cells
Correct Answer:
Germ cells
Explanation:
Male germ cells undergo successive divisions and differentiation to form spermatozoa.
4. Which cells provide nourishment and support to developing sperm cells?
A.
Sertoli cells
B.
Leydig cells
C.
Epithelial cells of the prostate
D.
Red blood cells
Correct Answer:
Sertoli cells
Explanation:
Sertoli cells support and nourish developing germ cells during spermatozoa formation in the seminiferous tubules.
5. Which stage immediately follows the formation of spermatids during spermatozoa formation?
A.
Spermiogenesis
B.
Ovulation
C.
Implantation
D.
Menstruation
Correct Answer:
Spermiogenesis
Explanation:
Spermiogenesis is the process in which spermatids differentiate and transform into mature spermatozoa.
6. What is the main change that occurs during spermiogenesis?
A.
Spermatids become mature spermatozoa
B.
Spermatozoa become egg cells
C.
Leydig cells become Sertoli cells
D.
The testis becomes an ovary
Correct Answer:
Spermatids become mature spermatozoa
Explanation:
During spermiogenesis, spermatids develop the structure of mature spermatozoa, including the head and tail.
7. Which structure helps a spermatozoon move?
A.
Tail
B.
Nucleus
C.
Acrosome
D.
Cell membrane only
Correct Answer:
Tail
Explanation:
The tail, or flagellum, provides motility to the spermatozoon.
8. Which part of a spermatozoon contains the genetic material?
A.
Head
B.
Tail
C.
Middle piece only
D.
Acrosome membrane
Correct Answer:
Head
Explanation:
The head of the spermatozoon contains the haploid nucleus carrying the male genetic material.
9. What type of cell division reduces the chromosome number during sperm formation?
A.
Meiosis
B.
Mitosis only
C.
Binary fission
D.
Budding
Correct Answer:
Meiosis
Explanation:
Meiosis reduces the chromosome number by half, producing haploid cells that can develop into spermatozoa.
10. Which hormone supports spermatozoa formation by acting on the seminiferous tubules?
A.
Testosterone
B.
Insulin
C.
Thyroxine
D.
Adrenaline
Correct Answer:
Testosterone
Explanation:
Testosterone produced by Leydig cells supports spermatogenesis within the seminiferous tubules.
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