Questions and Answers
What is the primary role of Luteinising Hormone in males?
Which hormone has the direct role of stimulating the synthesis of LH and FSH?
In which of the following animals is the oestrous cycle generally 21 days long?
What is the typical duration of oestrus in an ewe?
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Which hormone is critical for male sexual development and characteristics?
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What function does the acrosome serve in a sperm cell?
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In a sperm cell, what is primarily responsible for producing energy?
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What is the primary role of the flagellum in a sperm cell?
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What type of cell division leads to the formation of a haploid nucleus in sperm?
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What is the main function of centrioles found in the midpiece of a sperm cell?
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What role does luteinizing hormone (LH) play in the cow's reproductive system?
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What are the primary responsibilities of the oviducts in cow reproduction?
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How long is the gestation period for cows?
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Which hormone is essential for sustaining pregnancy in cows?
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What is the primary function of the uterus during cow reproduction?
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Which structure is mainly responsible for the deposition of sperm during mating?
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What function does follicle stimulating hormone (FSH) have in the cow's reproductive system?
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What significant advantage does artificial insemination provide in bovine breeding?
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Which of the following is commonly viewed as a drawback of artificial insemination?
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In what way does artificial insemination help manage disease risks in herds?
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Study Notes
Hormones and Functions in Males
- Luteinising Hormone (LH) primarily stimulates testosterone production in males, crucial for male sexual development.
- Gonadotropin Releasing Hormone (GnRH) is responsible for stimulating the synthesis of both LH and Follicle Stimulating Hormone (FSH).
Oestrous Cycle and Duration
- Cows and sows have a typical oestrous cycle length of approximately 21 days.
- The duration of oestrus in ewes is typically 24 to 36 hours.
Importance of Testosterone
- Testosterone is essential for sexual development and the expression of male characteristics.
Sperm Cell Structure and Functions
- The acrosome in a sperm cell is vital for fertilization as it contains enzymes necessary to penetrate the egg.
- The midpiece of the sperm cell is responsible for energy production, as it houses mitochondria that produce ATP for locomotion.
- The flagellum enables movement, allowing the sperm to travel toward the egg.
- Sperm cells undergo meiosis to form a haploid nucleus, containing condensed DNA.
Centrioles and Structural Support
- Centrioles located in the midpiece help support the function of the flagellum.
Role of the Cervix and Reproductive Hormones in Cows
- The cervix plays a protective role, preventing infection in the reproductive tract of cows.
- Luteinizing Hormone (LH) is primarily responsible for inducing ovulation in cows, while Progesterone (P4) maintains pregnancy.
Oviducts and Uterus Functions
- The oviducts are the sites of fertilization in the cow's reproductive system.
- The uterus nourishes and protects the embryo during its development.
Mating and Fertilization Process
- Sperm deposition during mating occurs in the vagina of the cow.
Follicle Stimulating Hormone (FSH) Function
- FSH promotes follicular development in cows, playing a crucial role in reproductive health.
Artificial Insemination in Bovine
- A major benefit of artificial insemination is access to superior genetics from top bulls, enhancing herd quality.
- Artificial insemination requires higher training for personnel, which can be a disadvantage but helps control disease by reducing the transmission of sexually transmitted diseases.
Economic Impacts and Risks of Artificial Insemination
- Artificial insemination can reduce costs associated with housing multiple breeding bulls, enhancing economic efficiency.
- Relying heavily on artificial insemination may risk decreased genetic diversity due to potential inbreeding.
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Description
Test your knowledge on the primary functions of hormones such as Luteinising Hormone, and their roles in male physiology. This quiz covers key concepts in endocrinology, including hormone interactions and animal reproductive cycles. Perfect for students looking to understand hormonal regulation in males and female cycles.
