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Objective Questions

Latest OPSC Veterinary Assistant Surgeon Exam Question (Objective Questions), MCQ in English

Subjects : Animal Science

Question Bank OPSC Veterinary Assistant Surgeon Exam Paper 2 - English
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Animal Science

Question 1Single Answer
The functional unit of the kidney is:
  1. A
    Neuron
  2. B
    Nephron
  3. C
    Alveolus
  4. D
    Osteon
Question 2Single Answer
Normal pacemaker of the mammalian heart is:
  1. A
    AV node
  2. B
    Bundle of His
  3. C
    Purkinje fibre
  4. D
    SA node
Question 3Single Answer
The hormone mainly responsible for milk ejection is:
  1. A
    Prolactin
  2. B
    Estrogen
  3. C
    Oxytocin
  4. D
    Progesterone
Question 4Single Answer
Milk synthesis is primarily stimulated by:
  1. A
    Prolactin
  2. B
    Oxytocin
  3. C
    ADH
  4. D
    FSH
Question 5Single Answer
Erythropoietin is produced mainly by the:
  1. A
    Liver
  2. B
    Spleen
  3. C
    Kidney
  4. D
    Pancreas
Question 6Single Answer
The major extracellular cation is:
  1. A
    Potassium
  2. B
    Sodium
  3. C
    Magnesium
  4. D
    Calcium
Question 7Single Answer
The major intracellular cation is:
  1. A
    Sodium
  2. B
    Chloride
  3. C
    Potassium
  4. D
    Calcium
Question 8Single Answer
Oxygen is transported mainly in blood by:
  1. A
    Albumin
  2. B
    Fibrinogen
  3. C
    Hemoglobin
  4. D
    Globulin
Question 9Single Answer
The oxygen-carrying pigment of RBCs is:
  1. A
    Myoglobin
  2. B
    Hemosiderin
  3. C
    Bilirubin
  4. D
    Hemoglobin
Question 10Single Answer
The principal site of gas exchange in lungs is:
  1. A
    Bronchi
  2. B
    Trachea
  3. C
    Bronchioles
  4. D
    Alveoli
Question 11Single Answer
Pulmonary surfactant mainly reduces:
  1. A
    Surface tension
  2. B
    Blood pressure
  3. C
    Respiratory rate
  4. D
    Oxygen content
Question 12Single Answer
Surfactant is secreted chiefly by:
  1. A
    Type I pneumocytes
  2. B
    Goblet cells
  3. C
    Macrophages
  4. D
    Type II pneumocytes
Question 13Single Answer
Carbon dioxide is transported mainly as:
  1. A
    Dissolved COโ‚‚
  2. B
    Carbaminohemoglobin
  3. C
    Carbon monoxide
  4. D
    Bicarbonate
Question 14Single Answer
The respiratory center is mainly located in the:
  1. A
    Cerebrum
  2. B
    Hypothalamus
  3. C
    Cerebellum
  4. D
    Medulla oblongata
Question 15Single Answer
Inspiration in mammals is normally:
  1. A
    Active
  2. B
    Passive
  3. C
    Absent at rest
  4. D
    Independent of muscles
Question 16Single Answer
The major inspiratory muscle is the:
  1. A
    Biceps
  2. B
    Rectus abdominis
  3. C
    Diaphragm
  4. D
    Trapezius
Question 17Single Answer
The first heart sound is caused mainly by closure of:
  1. A
    AV valves
  2. B
    Semilunar valves
  3. C
    Aortic valve only
  4. D
    Pulmonary valve only
Question 18Single Answer
The second heart sound is associated with closure of:
  1. A
    AV valves
  2. B
    Coronary valves
  3. C
    Venous valves
  4. D
    Semilunar valves
Question 19Single Answer
Cardiac output equals:
  1. A
    Heart rate ร— stroke volume
  2. B
    Blood pressure ร— pulse rate
  3. C
    Stroke volume รท heart rate
  4. D
    Heart rate รท stroke volume
Question 20Single Answer
Systole refers to:
  1. A
    Cardiac contraction
  2. B
    Cardiac relaxation
  3. C
    Ventricular filling only
  4. D
    Venous return
Question 21Single Answer
Diastole refers to:
  1. A
    Relaxation
  2. B
    Contraction
  3. C
    Depolarization only
  4. D
    Ejection only
Question 22Single Answer
The hormone that lowers blood glucose is:
  1. A
    Insulin
  2. B
    Glucagon
  3. C
    Cortisol
  4. D
    Epinephrine
Question 23Single Answer
Glucagon is secreted by pancreatic:
  1. A
    Acinar cells
  2. B
    Beta cells
  3. C
    Delta cells
  4. D
    Alpha cells
Question 24Single Answer
Insulin is secreted by pancreatic:
  1. A
    Beta cells
  2. B
    Alpha cells
  3. C
    Delta cells
  4. D
    PP cells
Question 25Single Answer
ADH primarily increases:
  1. A
    Urinary water loss
  2. B
    Glucose excretion
  3. C
    Sodium excretion
  4. D
    Water reabsorption
Question 26Single Answer
ADH is released from the:
  1. A
    Anterior pituitary
  2. B
    Thyroid
  3. C
    Posterior pituitary
  4. D
    Adrenal cortex
Question 27Single Answer
Aldosterone mainly promotes renal reabsorption of:
  1. A
    Glucose
  2. B
    Urea
  3. C
    Sodium
  4. D
    Creatinine
Question 28Single Answer
Aldosterone is secreted by the:
  1. A
    Adrenal medulla
  2. B
    Pineal gland
  3. C
    Pituitary
  4. D
    Adrenal cortex
Question 29Single Answer
Thyroxine contains:
  1. A
    Iron
  2. B
    Iodine
  3. C
    Copper
  4. D
    Zinc
Question 30Single Answer
Calcitonin tends to:
  1. A
    Lower blood calcium
  2. B
    Raise blood calcium
  3. C
    Raise blood glucose
  4. D
    Lower sodium
Question 31Single Answer
Parathyroid hormone primarily:
  1. A
    Decreases blood calcium
  2. B
    Increases potassium excretion only
  3. C
    Decreases blood glucose
  4. D
    Increases blood calcium
Question 32Single Answer
The main hormone of the adrenal medulla is:
  1. A
    Aldosterone
  2. B
    Progesterone
  3. C
    Cortisol
  4. D
    Epinephrine
Question 33Single Answer
Cortisol is secreted by the:
  1. A
    Pineal gland
  2. B
    Thyroid
  3. C
    Adrenal medulla
  4. D
    Adrenal cortex
Question 34Single Answer
Melatonin is produced by the:
  1. A
    Thyroid gland
  2. B
    Pineal gland
  3. C
    Adrenal gland
  4. D
    Pancreas
Question 35Single Answer
FSH in females mainly stimulates:
  1. A
    Luteolysis
  2. B
    Milk ejection
  3. C
    Parturition
  4. D
    Follicular development
Question 36Single Answer
LH surge is responsible for:
  1. A
    Implantation
  2. B
    Ovulation
  3. C
    Milk secretion
  4. D
    Spermatogonial mitosis only
Question 37Single Answer
Testosterone is produced mainly by:
  1. A
    Sertoli cells
  2. B
    Leydig cells
  3. C
    Spermatids
  4. D
    Epididymal cells
Question 38Single Answer
Sertoli cells are located in:
  1. A
    Seminiferous tubules
  2. B
    Epididymis
  3. C
    Prostate
  4. D
    Vas deferens
Question 39Single Answer
Spermatogenesis occurs in:
  1. A
    Epididymis
  2. B
    Seminal vesicles
  3. C
    Prostate gland
  4. D
    Seminiferous tubules
Question 40Single Answer
Sperm acquire progressive motility mainly in the:
  1. A
    Epididymis
  2. B
    Testis
  3. C
    Prostate
  4. D
    Urethra
Question 41Single Answer
Progesterone is mainly secreted by the:
  1. A
    Corpus luteum
  2. B
    Graafian follicle only
  3. C
    Pituitary
  4. D
    Adrenal medulla
Question 42Single Answer
Estrogen during the follicular phase originates mainly from:
  1. A
    Pancreas
  2. B
    Kidney
  3. C
    Ovarian follicles
  4. D
    Spleen
Question 43Single Answer
Luteolysis in many domestic species is caused by:
  1. A
    PGEโ‚‚
  2. B
    TSH
  3. C
    ACTH
  4. D
    PGFโ‚‚ฮฑ
Question 44Single Answer
The principal buffer system of extracellular fluid is:
  1. A
    Phosphate
  2. B
    Ammonia
  3. C
    Protein only
  4. D
    Bicarbonate
Question 45Single Answer
Blood pH is normally maintained near:
  1. A
    5.0
  2. B
    6.0
  3. C
    8.8
  4. D
    7.4
Question 46Single Answer
Hematocrit represents the percentage of:
  1. A
    Plasma proteins
  2. B
    WBC volume
  3. C
    RBC volume
  4. D
    Platelet volume
Question 47Single Answer
Platelets are mainly involved in:
  1. A
    Oxygen transport
  2. B
    Glucose transport
  3. C
    Antibody secretion
  4. D
    Blood clotting
Question 48Single Answer
Fibrinogen is converted into fibrin by:
  1. A
    Pepsin
  2. B
    Thrombin
  3. C
    Renin
  4. D
    Trypsin
Question 49Single Answer
Vitamin K is important for:
  1. A
    Vision
  2. B
    Calcium absorption only
  3. C
    Coagulation factor synthesis
  4. D
    Collagen degradation
Question 50Single Answer
The most abundant plasma protein is:
  1. A
    Hemoglobin
  2. B
    Fibrinogen
  3. C
    Albumin
  4. D
    Myosin
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