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Exam 21: Reproductive Systems

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Question 21

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Explain the process of spermatogenesis.Why must sperm cells have only 23 chromosomes?

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Spermatogenesis is the process by which ...

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Question 22

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The spermatids

A) are direct daughter cells of the spermatogonium
B) are direct daughter cells of the secondary spermatocytes
C) contain 23 chromosomes
D) both b and c above

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Question 23

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The narrow lower portion of the uterus is called the

Match each term with its definition or description. -Male sex hormone

A newborn girl has more ovarian follicles than a girl at puberty.

The ova that results from oogenesis contains 23 chromosomes.

When does the secretory phase of the female reproductive cycle occur? What happens during this phase?

Progesterone stimulates proliferation and vascularization of the epithelial lining of the uterus.

This hormone stimulates spermatogonia to undergo a unique type of cell division

The primary spermatocyte contains only 23 chromosomes.

Match each term with its definition or description. -Essential organ of the male reproductive system

The scrotum contains the testes,epididymis,the lower part of the ductus deferens,and the beginning of the spermatic cords.

LH stimulates the development of several immature ovarian follicles and is responsible for the release of estrogen.

The length of the reproductive cycle varies because the time between the end of menses and ovulation varies.

This gland is also called Cowper's gland and secretes a substance that lubricates the urethra and neutralizes any remaining acidic urine

The epididymis is a tube that permits sperm to pass from the scrotal sac into the abdominal cavity.

The location of the testes allows them to

The cytoplasm of the ovum is divided equally with the polar bodies.

A woman is fertile only about 14 days out of the 28-day menstrual cycle.

The part of the female reproductive cycle that begins at the end of menses and ends at ovulation is