Clairs revision small animal AnP

Question 1

What happens to the Embryo at 4Weeks?

Answer 1

Forming vertebrae + limb buds

20mm in length

Question 2

What happens to the Embryo at 5weeks??

Answer 2

Eye lids, internal ears and teeth start to form

35mm in length

Question 3

What happens to the foetus at 6Weeks?

Answer 3

Digits and external genitalia are well developed

60mm in length

Question 4

What happens to the Foetus at 7weeks?

Answer 4

Ossification of vertebrae + some long bones

100mm in length

Question 5

What happens to the Foetus at 8weeks?

Answer 5

Has hair and pads

150mm in length

Question 6

What happens to foetus at 9 weeks?

Answer 6

Foetus is usually delivered

Question 7

Function of the ovary?

Answer 7

Produce eggs ready for fertilisation

Secrete Oestrogen and Progesterone

Question 8

Function of the Uterus?

Answer 8

Provides an environment for development of Embryo

Question 9

Function of Testes?

Answer 9

Produce sperm and Testosterone

Question 10

Function of the Scrotum?

Answer 10

Holds the testes out side the body

Question 11

Function of the Cremaster Muscle?

Answer 11

Allows raising + lowering of the testiest

Question 12

Function of the Sertoli Cells?

Answer 12

Provide oestrogen’s + nutritive fluid for sperm

Question 13

Function of the Epididymus?

Answer 13

Transfer sperm 2 vas deference

Also acts as a storage organ

Question 14

Function of the Bulbo-urethral gland?

Answer 14

Contributes to seminal fluid

Question 15

Function of the Prepuce?

Answer 15

Lined with mucos epithelium protects penis

Pushed back during mating protects distal end of penis

Question 16

Name 2 accessory glands found in the male cats genital system?

Answer 16

Bulbo-urethral gland

Prostate

Question 17

How many pairs of teats dose a female guinea pig have?

Answer 17

Single pair of teats

Question 18

Describe the behaviour of the bitch during Pro-oestrus?

Answer 18

• increasingly attractive to males
• more active, restless urinate more
• will not stand to be mated

Question 19

Behaviour of bitch during Metoestrus?

Answer 19

Nesting behaviour begins

She will not stand to be mated

Term of pregnancy may become more dependant or less

Question 20

Bitches behaviour during Anoestrus?

Answer 20

No sexual activity

Not attractive to males

Question 21

Behaviour of bitch during Oestrus?

Answer 21

Flirting bitch will allow to be mated

Question 22

What dose the hormone Gonadotrophic releasing do?

Answer 22

Released from the hypothalamus in response to increasing day length

Question 23

What dose the hormone Oxytocin do?

Answer 23

Contraction of uterus

Milk let down

Question 24

What dose the Lutenising hormone do?

Answer 24

This hormone causes ovulation to occur

Question 25

Function of Testosterone?

Answer 25

Production of sperm Secondary sexual characteristics

Question 26

Function of Relaxin?

Answer 26

Produced by the corpus luteum in stages of pregnancy

Question 27

Describe the development of the Zygote from fertilisation to the formulation of the Morula?

Answer 27

- Following fertilisation. The zygote will travel down fallopian tube dividing cells as it goes (via mitosis) Eventually they form a solid ball of cells called morula

Question 28

What is the Ovum called once it has been fertilised??

Answer 28

Zygote

Question 29

Name two germ cell layers?

Answer 29

Ectoderm | Mesoderm

Question 30

When dose implantation of the embryo take place in the bitch?

Answer 30

14-20 after Ovulation

Question 31

What is the correct name for the water bag?

Answer 31

Chorio-allantosis

Question 32

What is the correct name for the slime bag?

Answer 32

Allanto-amnion

Question 33

What are the narrow bands between the placenta and the extra embryonic membranes called?

Answer 33

Marginal Haematomas

Question 34

What colour is the vaginal discharge of a queen at parturition?

Answer 34

Brown

Question 35

At what stage of embryonic development do limb buds appear??

Answer 35

Limb buds appear at 4 weeks of age.

Question 36

Describe describe the process of Spermatogenesis??

Answer 36

* Testies are made of seminiferous tubules lined with spermatogenic + sertoli cells * Spermatogenic cells are stimulated by testosterone to produce sperm thro process of mitosis + meiosis * Stertoli cells produce nutritive fluid which nourishes sperm * Leydig are stimulated by LH to produce testosterone

Question 37

Whats the difference between a spontaneous ovulation and induced ovulation?

Answer 37

Induced ovulation - only ovulate if married (cats,rabbits,ferrets) Spontaneous ovulation - dont need mated to ovulate (dogs,rats, guinea pigs)

Question 38

What effect the administration of progestogen has on the oestrus cycle of a bitch if it is given during pro-oestrus?

Answer 38

Can cause cystic endometrial hyper plasma and pyometra

Question 39

What happens to the embryo at 3Weeks?

Answer 39

Allantosis formed Embryo approx 5mm in length