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Questions and Answers
What characterizes in vivo fertilization?
What characterizes in vivo fertilization?
- It involves external manipulation of gametes.
- It happens naturally in the female tract. (correct)
- It occurs in a laboratory setting.
- It requires artificial assistance.
Which of the following statements about spermatogenesis is true?
Which of the following statements about spermatogenesis is true?
- It results in the production of spermatozoa from spermatids. (correct)
- It involves the division of ovocytes into secondary oocytes.
- It refers to the formation of eggs in females.
- It occurs only during specific seasons in male animals.
What is the primary role of the mitochondria in sperm cells?
What is the primary role of the mitochondria in sperm cells?
- To help with the sperm's movement.
- To produce ATP for energy. (correct)
- To assist in egg penetration.
- To store genetic material.
What is the function of the acrosome in the sperm?
What is the function of the acrosome in the sperm?
Which component is NOT part of the sperm's tail structure?
Which component is NOT part of the sperm's tail structure?
How is sperm count typically calculated?
How is sperm count typically calculated?
Which of the following describes in-vivo fertilization?
Which of the following describes in-vivo fertilization?
What is the main function of the acrosome in a spermatozoon?
What is the main function of the acrosome in a spermatozoon?
Which statement correctly distinguishes between spermagenesis and oogenesis?
Which statement correctly distinguishes between spermagenesis and oogenesis?
What does the tail of the spermatozoon primarily consist of?
What does the tail of the spermatozoon primarily consist of?
How is sperm count typically calculated?
How is sperm count typically calculated?
What is speciation in the context of fertilization?
What is speciation in the context of fertilization?
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Study Notes
Fertilization
- Hermaphroditism occurs in organisms such as Hydra, Tapescorno, mango, and orange trees.
- Fertilization, also known as syngamy, leads to the creation of new offspring within the same species.
- Two main types of fertilization:
- In vivo fertilization: Natural process taking place in the female reproductive tract.
- In vitro fertilization: Assisted process where fertilization occurs outside the body in a laboratory setting.
Sperm
- Types of sperm formation:
- Spermatogenesis: Development of sperm cells.
- Oogenesis: Development of egg cells.
- Sperm formation process: Spermatocytes develop into spermatids and eventually transform into spermatozoa.
Spermatozoa
- Spermatozoa are small cells encased in a plasma membrane.
- Head: Contains the nucleus and acrosome; the acrosome, derived from the Golgi apparatus, is packed with lytic enzymes crucial for penetrating egg cells.
- Midpiece: Houses an axial filament surrounded by mitochondria and cytoplasm; mitochondria generate energy necessary for sperm mobility.
- Tail: Comprises a central axial filament with a flagellum, enabling forward movement.
Notes
- Sperm count is quantitatively assessed using a Nomograph.
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