Reproduction Flashcards Preview

Essentials of Mammalian Biology Part Two > Reproduction > Flashcards

Flashcards in Reproduction Deck (38)
Loading flashcards...
1

Freshly ejaculated sperm needs to go through a process of change in order to fertilise the ovum. This process is called:

Capacitation

2

What is the name of the temporary endocrine gland that secretes progesterone?

Corpus Luteum

3

What best describes the order of cell division of the zygote ?

Zygote - blastomeres - morula- blastocyts

4

When does ovulation occur?

Just after the LH peak

5

Monozygotic (identical) twins are caused by two sperm fertilising a single egg. True or False

False

6

State five specific functions of the peak in oestrogen concentration during the cycle of the female mammal?

Causes behavioural oestrus 'heat'
Increases and thickens cervical mucus
Stimulates pituitary release of LH
Stimulates retrograde uterine contractions
inhibits follicle growth - promotes follicle atresia

7

State five specific functions of progesterone during the cycle and during pregnancy of the female mammal

Stimulates mammogenesis
Sensitise the brain to E2
Inhibits the immune activity of the uterus
Suppresses behavioural oestrus
Inhibits follicle growth

8

Where is the site of spermatogenesis?

Seminiferous tubules

9

What produces androgens?

Leydig cells

10

What does NOT stimulate uterine contractions in a pregnant mother

Progesterone

11

What duct is not part of the male reproductive system?

Ureter

12

Name a gland that is not part of the female reproductive system:

Bulbourethral gland

13

The corpus luteum will develop to form the placenta. True or False

False

14

Name the hormone that stimulates the cycling female mammal to be in 'heat'?

Oestrogen

15

During fertilisation the successful sperm penetrates the outer membrane of the ova. This is known as...

Zona pellucida

16

What is blastocyst is comprised of..

Trophoblast and the inner cell mass

17

What is not a mammalian placental type

Profuse

18

State two specific functions of FSH during the oestrus cycle

Stimulates growth of ovarian follicles
Stimulates secretion of E2 from Graafian follicles

19

State two specific functions of LH during the oestrus cycle

Causes ovulation
Stimulates formation of the CL

20

State one specific function of PGF during oestrus cycle

Causes luteolysis

21

What is the name of the temporary endocrine gland that secretes
progesterone?

Corpus Luteum

22

A cycle is approximately 28 days in duration in regards to the estrous cycle: True or False

False

23

Oestrogen inhibits parturition in regards to parturition: True or False

False

24

What are the two roles Luteinising hormone

Causes ovulation
Stimulates the remnants of the burst follicle to form a corpus luteum

25

What is the role of oxytocin

Stimulate uterine contractions at birth

26

What is the role of Prostaglandin

Luteolysis

27

What is the role gonadotrophin releasing hormone

Stimulates gonadotrophin release from pituitary

28

State five roles of Howlers

Stimulate follicle growth in the uterus
Stimulate cervical mucus which increase ovulation
Contraction in urine during childbirth
Leutenise sperm cells
Ejaculation of milk

29

Whats the function of the zona reaction?

Prevents polyspermy

30

Capacitation involves biochemical changes to the acrosome: True or False

True