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Questions and Answers
Where does spermatogenesis occur?
Where does spermatogenesis occur?
- Vas deferens
- Seminiferous tubules of testes (correct)
- Epididymis
- Prostate gland
At what stage of life does spermatogenesis begin?
At what stage of life does spermatogenesis begin?
- Before birth
- Infancy
- Adulthood
- Puberty (correct)
Approximately how many sperm are produced daily?
Approximately how many sperm are produced daily?
- 9 million
- 90 million (correct)
- 900 million
- 9000 million
What hormone initiates spermatogenesis?
What hormone initiates spermatogenesis?
What are the stem cells called that begin spermatogenesis?
What are the stem cells called that begin spermatogenesis?
What type of daughter cells remain at the basal lamina?
What type of daughter cells remain at the basal lamina?
What do Type B daughter cells develop into?
What do Type B daughter cells develop into?
Spermatocytes become _____ which eventually become sperm.
Spermatocytes become _____ which eventually become sperm.
What is the genetic region of the sperm called?
What is the genetic region of the sperm called?
The sperm head contains what helmet-like structure?
The sperm head contains what helmet-like structure?
The acrosome contains which enables sperm to penetrate the egg.
The acrosome contains which enables sperm to penetrate the egg.
Which major region of the sperm contains mitochondria?
Which major region of the sperm contains mitochondria?
What is the purpose of ATP in the sperm?
What is the purpose of ATP in the sperm?
Which is the locomotor region of the sperm?
Which is the locomotor region of the sperm?
What structure is included in the tail region of sperm?
What structure is included in the tail region of sperm?
What is the name of the duct that carries sperm from the epididymis to the ejaculatory duct?
What is the name of the duct that carries sperm from the epididymis to the ejaculatory duct?
Which structure of the testes is indicated by 'septum'?
Which structure of the testes is indicated by 'septum'?
What is the name of the outer covering of the testes?
What is the name of the outer covering of the testes?
In spermatogenesis, where do cells move after meiosis I?
In spermatogenesis, where do cells move after meiosis I?
What two processes does spermatogenesis involve?
What two processes does spermatogenesis involve?
Flashcards
Spermatogenesis
Spermatogenesis
The process of sperm production in the testes.
Seminiferous tubules
Seminiferous tubules
The location within the testes where spermatogenesis occurs.
Onset of Spermatogenesis
Onset of Spermatogenesis
Begins at puberty (around 14 years old) and continues throughout life.
Daily Sperm Production
Daily Sperm Production
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Testosterone's Role
Testosterone's Role
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Spermatogonia
Spermatogonia
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Type A Daughter Cells
Type A Daughter Cells
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Type B Daughter Cells
Type B Daughter Cells
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Spermatocytes
Spermatocytes
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Sperm Head
Sperm Head
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Acrosome
Acrosome
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Sperm Midpiece
Sperm Midpiece
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Sperm Tail
Sperm Tail
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Study Notes
Spermatogenesis
- Spermatogenesis occurs in the seminiferous tubules of the testes.
- Spermatogenesis begins at puberty, around 14 years of age, and continues throughout life.
- Approximately 90 million sperm are produced daily.
- Testosterone, the male sex hormone, initiates spermatogenesis.
Starting Point
- Spermatogenesis begins with spermatogonia, which are stem cells.
- After puberty, each cell division produces type A and type B daughter cells.
- Type A daughter cells stay at the basal lamina, maintaining the dividing germ cell pool.
- Type B daughter cells differentiate into primary spermatocytes.
Spermatocytes
- Spermatocytes develop into spermatids, which eventually mature into sperm.
Sperm: Major Regions
- The head of the sperm contains DNA.
- The head includes the nucleus and an acrosome, a helmet-like structure with enzymes to penetrate the egg.
- The midpiece is a metabolic region with mitochondria that produce ATP to move the tail.
- The tail is a locomotor region including a flagellum.
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