32 Questions
What is the total number of chromosomes in a sperm cell and an oocyte that fuse during fertilization?
92
Why do the dartos and cremaster muscles contract in cold weather or cold water?
To keep the testes warm
What is the function of Sertoli cells in the seminiferous tubules?
To control sperm production and create the blood-testes barrier
How many lobules are there in each testis?
300-400
What is the function of the tunica albuginea?
To separate each testis into lobules
How many different cell types are present in the seminiferous tubules?
6
What is the first stage of spermatogenesis, where the least mature cells are found?
Spermatogonia
What is the process by which the number of chromosomes in cells is halved during spermatogenesis?
Meiosis
How many days does it take for one cycle of sperm development to complete?
64 days
What is the structure that covers the nucleus of the sperm cell and contains lysosomal enzymes?
Head
What is the purpose of the ATP produced by the mitochondria in the sperm cell?
To power the flagellum
Where do newly formed sperm cells continue to mature after spermatogenesis?
Epididymis
What is the percentage of semen that is made up of sperm?
5%
What is the purpose of the fluid released by the bulbourethral glands during ejaculation?
To lubricate and clean away urine residue
What is the hormone responsible for differentiating male sexual reproductive organs in a fetus?
Testosterone
What is the term for one or both testes failing to descend into the scrotum prior to birth?
Cryptorchidism
What is the primary function of the microorganisms present in the vagina?
To protect from pathogens
What is the purpose of the tunica albuginea in the ovaries?
To cover and protect the ovaries
What is the approximate duration of an ovarian cycle?
28 days
What is the purpose of oogonia during fetal development?
To form primary oocytes
What is the result of meiosis in the ovum if it is penetrated by a sperm cell?
The formation of a diploid zygote
Why is mitochondrial DNA inherited from the mother only?
Because the ovum has a lot of cytoplasm
What is the process called when multiple follicles die?
Atresia
What is the purpose of FSH in the ovarian cycle?
To stimulate follicle growth
What is the purpose of the cilia in the uterine tubes?
To push the oocyte towards the uterus
What is the purpose of progesterone in the uterus?
To inhibit GnRH in the hypothalamus
What happens to the corpus luteum if there is no pregnancy within 10-12 days?
It degrades
What is the primary function of the breasts in the reproductive system?
To provide milk or colostrum through lactation
How does hormonal birth control work?
By supplying a constant amount of estrogen and progesterone
What determines the sex of an individual?
The presence of the Y chromosome
What is the primary role of the hypothalamus during puberty?
To increase hormone production
What is a common factor influencing the onset of puberty in females?
Poor nutrition leading to an increase in body fat
Learn about gametes, chromosomes, and the reproductive system. Understand how sperm cells and oocytes combine to form a zygote with 46 chromosomes. Discover the role of testes, scrotum, and temperature in sperm production.
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