MCQ 1 Flashcards
Primary reproductive organ of the female?
Ovary
Corpus Albicans
The regressed Corpus Luteum
Going from the outside to the inside of the female reproductive system, which of the following is correct?
Vulva, Cervix, Oviduct and Ovary
In which of the following species does ovulation occur at only one place on the surface of the ovary
Mare
Who first identified spermatozoa with the microscope?
Van Leeuwenhoek
The pampiniform plexus is involved in temperature regulation of the testes and is located where?
Spermatic Chord
Which of the following is involved in sperm storage in the male?
Caudal tail and Epididymis
Which of the following endocrine glands are located in the head?
Pineal, Anterior Pituitary and Hypothalamus
(All of the above)
Puberty occurs at 6-7 months of age in?
Gilts
Seasonally polyoestrus
Ovine and Equine
Oestrus cycles throughout the year?
Bovine and Porcine
Fluid-filled follicles visible on the surface of the ovary are described as?
Tertiary Follicles
The acrosome is not?
Part of the sperm mid-piece
Sperm motility is driven by mitochondria in the?
Mid-piece
Vandenbergh Effect
Refers to the advancement of the onset of puberty following exposure to a male
Function of the uterus is to cause luteolysis?
True
A useful measure of puberty in a bull is the age at which there are sufficient sperm present in the ejaculate to successfully breed females?
True
At the time fertilisation, both the oocyte and the sperm are hybrid?
True
The pampiniform plexus compromises of arteries, veins and serves to warmth the testes
False
Seminiferous tubules are the site of testosterone production in the male?
False
The sow is a spontaneous ovulatory while the cat is an induced ovulatory?
True
The CL -> After the ovulation of the dominant follicle
True
The seminal vesicles are the site of spermatogenesis (Sperm Production) in the males?
False
Freemartin
A sterile heifer born twin to a male
Vasectomised animals -> Teasers to detect oestrus because?
They have normal levels of testosterone, normal libido and cannot get females pregnant
(All of the above)
The sex of the offspring is determined by?
The sperm
The most important function of the epididymis is?
Sperm maturation
The volume of a typical ejaculate in the boar is?
200-250ml
Glycerol is induced during semen processing to?
Prevent ice crystal formation during cryopreservation
Traditionally, most genetic gain in cattle comes from the selection of superior males because?
Males produce millions of gametes per ejaculation
Castration in the bull typically involves?
Cutting the blood supply to the testes with a consequence reduction in libido
The spermatic chord in order
Van Deferens, vasculature, cremaster muscle and pampiniform plexus
In the male FSH stimulates?
Spermatogenesis
Daily sperm production I farm animals is approximately?
15-30 X 109 sperm per gram of testis
During each oestrus cycle cows typically have?
2-3 waves of follicular growth
A signalling pheromone?
Has a direct effect on the behaviour of the recipient animal
The Whitten Effect in mice?
Refers to a tendency to shorten and synchronise oestrus cycles in females induced by the introduction of a male, is caused by androgens in male urine and is similar to the ram effect in sheep.
(ALL OF THE ABOVE)
The duration of spermatogenesis is?
Months
- In rams the difference between body and testicular temperature is approximately?
4’ degrees
Sertoli Cells are contained in the?
Seminiferous tubules
The main reason why collecting semen using an artificial vagina is preferable to using an electro-ejaculate is because?
You get a better sample
Function of the Leydig Cells is to?
Produce androgens
An average ejaculate in the bull contains?
10 billion spermatozoa
The typical number of sperm used in bovine AI with frozen-thawed semen is?
20 million
If a boar is given fence line access to a group of gilts, this will cause the age of puberty to be decreased compared to non-exposed gilts?
True
Spermatogenesis includes the 3 main phases of spermatocytogenesis, meiosis and spermatogenesis?
True
Best fertility is achieved if a cow is inseminated at the start of behavioural oestrus?
False
The CL produces Oestradiol which is responsible for maintenance of pregnancy?
False
Prostaglandin F2 Alpha is the main luteolytic factor and is produced by?
The uterus
Progesterone (P4) and Prostaglandin F2 Alpha have similar actions during reproduction?
False
