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Questions and Answers
Where does spermatogenesis occur?
Where does spermatogenesis occur?
- Testes (correct)
- Epididymis
- Seminal vesicles
- Prostate gland
What do male and female gametes arise from?
What do male and female gametes arise from?
- Red blood cells
- Muscle cells
- Primordial germ cells (correct)
- Somatic cells
What is the result of oogenesis?
What is the result of oogenesis?
- Formation of haploid spermatozoa
- Formation of diploid ova
- Formation of small, motile spermatozoa
- Formation of large, non-motile ova (correct)
What do primordial germ cells become in males and females?
What do primordial germ cells become in males and females?
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What is the function of the blood-testis barrier?
What is the function of the blood-testis barrier?
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Which cells are responsible for supporting the developing spermatozoa?
Which cells are responsible for supporting the developing spermatozoa?
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Why is it important for the blood-testis barrier to prevent the immune system from recognizing the sperm as foreign?
Why is it important for the blood-testis barrier to prevent the immune system from recognizing the sperm as foreign?
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Study Notes
Gametogenesis
- Spermatogenesis occurs in the seminiferous tubules of the testes.
- Male and female gametes (spermatozoa and ova) arise from primordial germ cells.
- The result of oogenesis is the formation of ova (egg cells).
Primordial Germ Cells
- In males, primordial germ cells become spermatogonia, which differentiate into spermatozoa.
- In females, primordial germ cells become oogonia, which differentiate into ova.
Blood-Testis Barrier
- The blood-testis barrier, also known as the Sertoli cell barrier, is a physical barrier between the seminiferous tubules and the bloodstream.
- The function of the blood-testis barrier is to isolate the developing spermatozoa from the immune system and prevent an autoimmune response.
- Sertoli cells are responsible for supporting the developing spermatozoa and forming the blood-testis barrier.
Immune System and Sperm
- If the immune system recognizes sperm as foreign, it would mount an immune response, damaging the sperm and making fertilization impossible.
- The blood-testis barrier prevents the immune system from recognizing the sperm as foreign, allowing fertility to occur.
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