Animal Reproduction MCQ Quiz

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Questions and Answers

What is the primary role of Luteinising Hormone in males?

Stimulates testosterone production (correct)

Stimulates synthesis of sperm cells

Regulates libido and sexual development

Inhibits follicle development

Which hormone has the direct role of stimulating the synthesis of LH and FSH?

Gonadotropin Releasing Hormone (GnRH) (correct)

Luteinising Hormone

Testosterone

Follicle Stimulating Hormone (FSH)

In which of the following animals is the oestrous cycle generally 21 days long?

Cow (correct)

Ewe

Sow (correct)

All of the above

What is the typical duration of oestrus in an ewe?

24 to 36 hours Signup and view all the answers

Which hormone is critical for male sexual development and characteristics?

Testosterone Signup and view all the answers

What function does the acrosome serve in a sperm cell?

Fertilisation of the egg Signup and view all the answers

In a sperm cell, what is primarily responsible for producing energy?

Midpiece Signup and view all the answers

What is the primary role of the flagellum in a sperm cell?

To enable movement Signup and view all the answers

What type of cell division leads to the formation of a haploid nucleus in sperm?

Meiosis Signup and view all the answers

What is the main function of centrioles found in the midpiece of a sperm cell?

Support the function of the flagellum Signup and view all the answers

What role does luteinizing hormone (LH) play in the cow's reproductive system?

Triggers ovulation Signup and view all the answers

What are the primary responsibilities of the oviducts in cow reproduction?

Site of fertilization Signup and view all the answers

How long is the gestation period for cows?

Three months, three weeks, and three days Signup and view all the answers

Which hormone is essential for sustaining pregnancy in cows?

Progesterone (P4) Signup and view all the answers

What is the primary function of the uterus during cow reproduction?

Provides nutrients and protection for the fetus Signup and view all the answers

Which structure is mainly responsible for the deposition of sperm during mating?

Vagina Signup and view all the answers

What function does follicle stimulating hormone (FSH) have in the cow's reproductive system?

Promotes follicular development Signup and view all the answers

What significant advantage does artificial insemination provide in bovine breeding?

Access to superior genetics from top bulls Signup and view all the answers

Which of the following is commonly viewed as a drawback of artificial insemination?

Greater reliance on technician training Signup and view all the answers

In what way does artificial insemination help manage disease risks in herds?

Reduces the chances of sexually transmitted diseases Signup and view all the answers

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.