Lecture 24-Reproductive System Flashcards Preview

Biology 2 > Lecture 24-Reproductive System > Flashcards

Flashcards in Lecture 24-Reproductive System Deck (56):
0

Reproduction is the process of producing __________ from __________.

Offspring, parents

1

Generation of new individuals without the fusion of egg and sperm (Examples: fission, budding, parthenogenesis).

Asexual reproduction

2

Fusion of haploid gametes forming a diploid cell, called the zygote.

Sexual reproduction

3

Diploid cell formed through sexual reproduction.

Zygote

4

Advantages to sexual reproduction:

Creation of genetic variation, recombination, and DNA repair

5

Disadvantages to sexual reproduction:

Only one sex can bear young, males and females must search each other out, only half of the genes are passed on

6

Gametes are __________ reproductive cells.

Haploid

7

Produced by male. Small, motile, hundreds of millions produced each day.

Sperm

8

Produced by female. Large, nonmotile, one produced each month (500 per lifetime).

Egg

9

Spiders have __________, which is the modification of the appendages (basically a spider penis).

Pedipalp

10

Ducks have this, which travels through the convoluted female reproductive tract.

Corkscrew penis

11

Snakes have a:

Hemipenis

12

Most mammals have __________, which is a bone inside the penis. Humans don't have this.

Baculum

13

Site for egg production.

Ovaries

14

Aka Fallopian tube.

Oviduct

15

Thick, muscular organ (womb).

Uterus

16

Inner lining of the uterus.

Endometrium

17

Male gonads consisting of many highly coiled tubes.

Testes

18

Site for sperm maturation.

Epididymis

19

Muscular duct

Vas deferens

20

Produces mucus, fructose, coagulating enzyme, ascorbic acids, and prostaglandins.

Seminal vesicle

21

Produces,anticoagulant enzymes and citrate.

Prostate gland

22

__________ in females are homologous to testes in males.

Ovaries

23

__________ in females is homologous to penis in males.

Clitoris

24

Production of male gametes.

Spermatogenesis

25

Sperm production in males is continuous from __________ to ___________.

Puberty to death

26

How many sperm in each ejaculate?

About 160 million

27

Under the right conditions, sperms can survive about _____ days in a female.

5

28

Testes produce sperm in highly coiled tubules called:

Seminiferous tubules

29

Production of female gametes.

Oogenesis

30

Immature eggs form in the ovary of the __________ __________, but do not complete until __________ __________.

Female embryo, sexual maturation

31

Ploidy of primary spermatocyte:

2n

32

Ploidy of secondary spermatocyte:

N

33

In embryo: (ploidy stages)

Primordial germ cell (2n)-----> Oogonia (2n)-----> Primary oocyte (2n)

34

At liberty, completion of meiosis I to result in __________ __________.

Secondary oocyte

35

The development of a secondary oocyte is arrested at __________ of __________.

Metaphase, meiosis II

36

After fertilization, completion of meiosis II results in:

A fertilized egg

37

In spermatogenesis, all _____ products of meiosis develop into gametes.

4

38

In spermatogenesis, mitotic division occurs throughout __________ and __________.

Adolescence, adulthood

39

Mature sperm is produced from __________ __________ without interruption.

Precursor cell

40

In oogenesis, __________ __________ results in a single gamete.

Unequal meiosis

41

In oogenesis, mitotic division is completed before:

Birth

42

In females, gametogenesis ceases at about age:

50

43

Mature eggs are produced from precursor cells with:

Long interruptions

44

Master gland the produces many hormones.

Anterior pituitary gland

45

Gonadotropin-Releasing Hormone (GnRH) is produced in the:

Hypothalamus

46

Luteinizing Hormone (LH) is produced in the:

Anterior pituitary glands

47

Follicle-Stimulating Hormone (FSH) is produced in the:

Anterior pituitary gland

48

Testosterone is produced in the:

Testes

49

_____ and _____ are required for normal spermatogenesis.

FSH and LH

50

FSH promotes activity of:

Sertoli cells

51

LH regulates:

Leydig cells

52

In the __________ ___________ follicles mature, ovulation, corpus luteum degenerates.

Ovarian cycle

53

In the __________ __________ there are changes in the uterus (thickening and shedding of endometrium)(28 day cycle).

Uterine cycle

54

Key hormones in the female reproductive cycle are:

GnRH, LH, FSH, estradiol, and progesterone

55

Gametes are produced by:

Meiosis