All Free Veterinary Science MCQs with Answers

• A. Storage of mature spermatozoa
• B. Secretion of testosterone into semen
• C. Cooling of arterial blood to the testis
• D. Transport of sperm through the urethra

Explanation: The pampiniform plexus forms a countercurrent heat exchange system that cools arterial blood entering the testis.

• A. Ewe
• B. Bitch
• C. Doe goat
• D. Mare

Explanation: The mare shows increased reproductive activity as day length increases in spring and summer, so she is a long-day breeder.

• A. Copulation or cervical stimulation
• B. A sudden fall in progesterone
• C. A prolonged period of fasting
• D. Complete follicular luteinisation before mating

Explanation: The queen is an induced ovulator, and mating commonly provides the neural stimulation needed to trigger an LH surge and ovulation.

• A. 10 mm for 3 days
• B. 25 mm for 10 days
• C. 15 mm for 5 days
• D. 40 mm for 21 days

Explanation: A bovine follicular cyst is commonly defined as a fluid-filled follicular structure of at least about 25 mm that persists for 10 days or…

• A. Mild udder enlargement before calving
• B. Relaxation of the pelvic ligaments
• C. Failure of normal fetal delivery despite strong efforts
• D. A temporary decrease in feed intake

Explanation: Dystocia means difficult or abnormal birth, commonly shown by failure to deliver the fetus despite effective uterine contractions or…

• A. To initiate ovulation in the female
• B. To increase the genetic age of spermatozoa
• C. To destroy all seminal plasma proteins
• D. To preserve sperm viability during storage and transport

Explanation: Semen extenders provide nutrients, buffering capacity and protection against temperature and osmotic injury, thereby maintaining sperm…

• A. Reduced fertility due to impaired sperm production
• B. Increased fertility from extra testosterone
• C. Permanent absence of testosterone secretion
• D. Failure of the penis to develop in every case

Explanation: An abdominal or inguinal testis remains warmer than the scrotal testis, which impairs spermatogenesis and may cause infertility or…

• A. Proestrus
• B. Oestrus
• C. Metestrus
• D. Diestrus

Explanation: Oestrus is the period when the female is sexually receptive and permits mating.

• A. Stimulating follicular recruitment
• B. Maintaining uterine tone
• C. Inducing ovulation and luteinisation
• D. Promoting mammary secretion

Explanation: The LH surge triggers ovulation and transforms the ruptured follicle into a corpus luteum.

• A. Prostate gland
• B. Ampullary glands
• C. Bulbourethral glands
• D. Seminal vesicles

Explanation: The seminal vesicles provide a major volume of seminal plasma in the stallion.

• A. Endometrial lining
• B. Ovarian surface
• C. Cervical epithelium
• D. Vaginal mucosa

Explanation: Implantation occurs when the developing conceptus attaches to and interacts with the endometrium of the uterus.

• A. Sperm concentration
• B. Progressive motility
• C. Seminal pH
• D. Ejaculate volume

Explanation: Progressive motility measures the proportion of sperm moving actively forward, which is important for reaching the site of fertilisation.

• A. Uterine horn
• B. Endometrial gland
• C. Caruncle
• D. Cervical fold

Explanation: A placentome consists of a fetal cotyledon attached to a maternal caruncle.

• A. Increasing light exposure at mating
• B. Delaying water access after mating
• C. Restricting feed before mating
• D. Using clean breeding facilities

Explanation: Clean facilities and hygienic breeding procedures reduce the introduction of pathogenic organisms into the reproductive tract.

• A. Produce sufficient interferon tau
• B. Enter the vagina
• C. Form ovarian follicles
• D. Open the cervix

Explanation: The bovine conceptus must produce adequate interferon tau to prevent maternal luteolysis and maintain the corpus luteum.

• A. Vaginitis
• B. Endometritis
• C. Orchitis
• D. Mastitis

Explanation: Endometritis is inflammation of the uterine lining and commonly follows contamination or trauma around parturition.

• A. To prevent ovarian activity
• B. To provide colostrum
• C. To stimulate and detect oestrus
• D. To increase gestation length

Explanation: A teaser animal is used to identify females showing sexual receptivity and therefore likely to be in oestrus.

• A. Shows external growth without ovarian activity
• B. Completes physical growth and reaches adult weight
• C. Accepts mating during a single silent period
• D. Ovulates and develops functional reproductive cycles

Explanation: Puberty begins when the reproductive system becomes functionally capable, usually shown by ovulation and continuing ovarian cycles.

• A. Absence of observable or ovarian oestrous activity
• B. Failure of fertilisation after repeated mating
• C. Abnormal enlargement of the pregnant uterus
• D. Inflammation of the uterine lining after birth

Explanation: Anestrus means a period of reproductive quiescence in which oestrous cycles are absent or not detectable.

• A. Oestrogen after follicular growth
• B. Progesterone during the luteal phase
• C. Oxytocin during cervical relaxation
• D. Prostaglandin during follicular atresia

Explanation: Pyometra commonly develops during progesterone-dominated diestrus, when uterine glandular secretion and reduced uterine defence favour…