AAVSB PAVE QUALIFYING SCIENCE
EXAMINATION (QSE) 2026/2027
COMPREHENSIVE PRACTICE
QUESTIONS AND DETAILED
SOLUTIONS LATEST UPDATE
1. Which cranial nerve is responsible for the motor innervation of the dorsal oblique muscle
of the eye?
A. Cranial Nerve III (Oculomotor)
B. Cranial Nerve V (Trigeminal)
C. Cranial Nerve VI (Abducent)
D. Cranial Nerve IV (Trochlear)
Answer: D
Conceptual Explanation: The trochlear nerve (CN IV) uniquely innervates the dorsal
oblique muscle. CN III innervates most other extraocular muscles, and CN VI innervates the
lateral rectus and retractor bulbi.
2. In the renal physiology of a canine, what is the primary site of action for Antidiuretic
Hormone (ADH)?
A. Proximal convoluted tubule
,B. Descending limb of the Loop of Henle
C. Collecting ducts
D. Glomerulus
Answer: C
Conceptual Explanation: ADH acts on the collecting ducts by increasing the expression of
aquaporins, allowing for water reabsorption back into the medullary interstitium.
3. Which mechanism best describes the action of Flunixin Meglumine in horses?
A. Selective inhibition of Lipoxygenase
B. Non-selective inhibition of Cyclooxygenase (COX-1 and COX-2)
C. Inhibition of phospholipase A2
D. Antagonism of Histamine H2 receptors
Answer: B
Conceptual Explanation: Flunixin meglumine is a non-steroidal anti-inflammatory drug
(NSAID) that inhibits both COX-1 and COX-2 enzymes, thereby reducing prostaglandin
synthesis.
4. What is the hallmark histopathological finding of Rabies virus infection in the mammalian
brain?
A. Intranuclear inclusion bodies in neurons
B. Demyelination of white matter tracts
, C. Perivascular cuffing of neutrophils
D. Negri bodies (intracytoplasmic inclusions)
Answer: D
Conceptual Explanation: Negri bodies are pathognomonic eosinophilic, intracytoplasmic
inclusion bodies found in neurons (especially in the hippocampus or cerebellum) infected
with the Rabies virus.
5. Which biochemical pathway is responsible for the production of glucose from non-
carbohydrate precursors like lactate and glycerol?
A. Glycolysis
B. Glycogenolysis
C. Gluconeogenesis
D. Pentose Phosphate Pathway
Answer: C
Conceptual Explanation: Gluconeogenesis is the metabolic pathway that results in the
generation of glucose from certain non-carbohydrate carbon substrates.
6. Type I Hypersensitivity reactions are primarily mediated by which immunoglobulin and cell
type?
A. IgE and Mast cells
B. IgG and Macrophages
EXAMINATION (QSE) 2026/2027
COMPREHENSIVE PRACTICE
QUESTIONS AND DETAILED
SOLUTIONS LATEST UPDATE
1. Which cranial nerve is responsible for the motor innervation of the dorsal oblique muscle
of the eye?
A. Cranial Nerve III (Oculomotor)
B. Cranial Nerve V (Trigeminal)
C. Cranial Nerve VI (Abducent)
D. Cranial Nerve IV (Trochlear)
Answer: D
Conceptual Explanation: The trochlear nerve (CN IV) uniquely innervates the dorsal
oblique muscle. CN III innervates most other extraocular muscles, and CN VI innervates the
lateral rectus and retractor bulbi.
2. In the renal physiology of a canine, what is the primary site of action for Antidiuretic
Hormone (ADH)?
A. Proximal convoluted tubule
,B. Descending limb of the Loop of Henle
C. Collecting ducts
D. Glomerulus
Answer: C
Conceptual Explanation: ADH acts on the collecting ducts by increasing the expression of
aquaporins, allowing for water reabsorption back into the medullary interstitium.
3. Which mechanism best describes the action of Flunixin Meglumine in horses?
A. Selective inhibition of Lipoxygenase
B. Non-selective inhibition of Cyclooxygenase (COX-1 and COX-2)
C. Inhibition of phospholipase A2
D. Antagonism of Histamine H2 receptors
Answer: B
Conceptual Explanation: Flunixin meglumine is a non-steroidal anti-inflammatory drug
(NSAID) that inhibits both COX-1 and COX-2 enzymes, thereby reducing prostaglandin
synthesis.
4. What is the hallmark histopathological finding of Rabies virus infection in the mammalian
brain?
A. Intranuclear inclusion bodies in neurons
B. Demyelination of white matter tracts
, C. Perivascular cuffing of neutrophils
D. Negri bodies (intracytoplasmic inclusions)
Answer: D
Conceptual Explanation: Negri bodies are pathognomonic eosinophilic, intracytoplasmic
inclusion bodies found in neurons (especially in the hippocampus or cerebellum) infected
with the Rabies virus.
5. Which biochemical pathway is responsible for the production of glucose from non-
carbohydrate precursors like lactate and glycerol?
A. Glycolysis
B. Glycogenolysis
C. Gluconeogenesis
D. Pentose Phosphate Pathway
Answer: C
Conceptual Explanation: Gluconeogenesis is the metabolic pathway that results in the
generation of glucose from certain non-carbohydrate carbon substrates.
6. Type I Hypersensitivity reactions are primarily mediated by which immunoglobulin and cell
type?
A. IgE and Mast cells
B. IgG and Macrophages
