Free Basic and Clinical Sciences Examination Practice Questions

Sample Practice Questions

Try these 10 sample questions from the Basic and Clinical Sciences Examination practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1During a canine heart dissection, which valve should the veterinarian identify between the right atrium and right ventricle?

   1. A. Mitral valve
   2. B. Tricuspid valve
   3. C. Aortic valve
   4. D. Pulmonic valve

   Answer: B

   Explanation: The manual identifies the "left and right atrioventricular (mitral and tricuspid)" valves. The right atrioventricular valve is therefore the tricuspid valve.

   Reference: The Cardiovascular System in Animals — Introduction; Heart Rate and the Electrocardiogram; Hindrance to Blood Flow

2. 2A veterinarian wants to estimate how extensively an IV drug leaves a dog's plasma and distributes into tissues. Which pharmacokinetic parameter addresses that question?

   1. A. Plasma clearance
   2. B. Apparent volume of distribution
   3. C. Elimination half-life
   4. D. Elimination rate constant

   Answer: B

   Explanation: The source states, "The pharmacokinetic parameter used to assess the extent of drug distribution throughout the body is known as the apparent volume of distribution (Vd)." This matches the veterinarian's question.

   Reference: Pharmacokinetics — Apparent Volume of Distribution; Elimination Rate Constant; Steady-State Plasma Concentration

3. 3An intestinal biopsy from a dog with parvoviral enteritis is examined for the primary epithelial target. Which compartment should show destruction?

   1. A. Villus tip epithelium
   2. B. Crypt epithelium
   3. C. Serosal mesothelium
   4. D. Submucosal endothelium

   Answer: B

   Explanation: The source states, "Feline panleukopenia virus and canine parvovirus destroy the crypt epithelium". Thus the crypt epithelium is the primary histologic target.

   Reference: The Digestive System in Animals — Pathophysiology of the Digestive System

4. 4An intact bitch develops cystic endometrial hyperplasia after repeated estrous cycles. Which hormone primarily mediates the endometrial gland proliferation underlying this condition?

   1. A. Oxytocin
   2. B. Estradiol
   3. C. Progesterone
   4. D. Prolactin

   Answer: C

   Explanation: The source states, "Cystic endometrial hyperplasia is mediated by progesterone and potentially aggravated by estrogens". Progesterone is the primary mediator asked about.

   Reference: Cystic Endometrial Hyperplasia–Pyometra Complex in Small Animals — Etiology of Cystic Endometrial Hyperplasia–Pyometra Complex

5. 5During maintenance anesthesia in a dog, which monitored measurement most directly assesses ventilation?

   1. A. End-tidal carbon dioxide
   2. B. Pulse oxygen saturation
   3. C. Systolic blood pressure
   4. D. Electrocardiographic rhythm

   Answer: A

   Explanation: The guideline distinguishes "oxygenation (percentage of hemoglobin saturated with oxygen [Sp O2]), and ventilation (ETC O2)." End-tidal carbon dioxide assesses ventilation.

   Reference: 2020 AAHA Anesthesia and Monitoring Guidelines for Dogs and Cats — Anesthetic Protocol — Step 4c Anesthetic Induction; Step 4d Anesthetic Maintenance; Step 4e Recovery from Anesthesia

6. 6A veterinarian irrigates a contaminated dog bite wound using a syringe-and-needle system. What approximate pressure does the manual recommend for that lavage system?

   1. A. 2–3 psi
   2. B. 7–8 psi
   3. C. 12–13 psi
   4. D. 18–20 psi

   Answer: B

   Explanation: The source specifies "A recommended lavage system delivering 48–55 kPa (7–8 psi) of pressure". The recommended approximate pressure is 7–8 psi.

   Reference: Initial Wound Management in Small Animals — Wound Lavage; Surgical Debridement; Wound Closure; Open Wound Management

7. 7A dog has suspected bacterial urinary tract infection. Which urine collection method gives the most reliable sample for culture and susceptibility testing?

   1. A. Spontaneous micturition
   2. B. Manual bladder compression
   3. C. Urethral catheterization
   4. D. Cystocentesis

   Answer: D

   Explanation: The source describes cystocentesis as the method that "Provides sterile urine sample most reliable for bacterial culture and antimicrobial sensitivity testing." Thus cystocentesis is preferred.

   Reference: The Urinary System in Animals — Bacterial Culture of Urine

8. 8During an in-hospital euthanasia of a companion dog with the owner present, which vascular access approach does the cited end-of-life guideline report AVMA recommends for administering the solution?

   1. A. A peripheral butterfly needle placed for immediate injection
   2. B. A peripheral venipuncture needle placed for immediate injection
   3. C. A secured peripheral intravenous catheter
   4. D. A secured intraosseous infusion catheter

   Answer: C

   Explanation: The AAHA guideline reports, "The AVMA also recommends the use of IV catheters for administration of euthanasia solutions to companion animals when clients are present." Intravenous catheter access matches that recommendation.

   Reference: 2016 AAHA/IAAHPC End-of-Life Care Guidelines — The End-of-Life Event — In-hospital euthanasia

9. 9A cat is diagnosed with heartworm disease. Which preventive care fact makes prophylaxis especially important for this species?

   1. A. Preventive treatment is available, but no safe or acceptable treatment is available after infection.
   2. B. Preventive treatment is available, and curative adulticide treatment is routinely available.
   3. C. Preventive treatment is unavailable, but a curative adulticide treatment is routinely available.
   4. D. Preventive treatment is unavailable, and infection is controlled only by vector avoidance.

   Answer: A

   Explanation: The manual states, "Although a treatment is currently available for heartworm disease in dogs, no safe or acceptable treatment is available for cats." It also states, "Heartworm disease, an important clinical entity in both dogs and cats, is preventable with prophylactic treatment." Thus prevention is available despite the lack of a safe treatment in cats.

   Reference: Preventative Health Care for Small Animals — Parasite Control in Small Animals

10. 10A veterinarian traces blood leaving the left ventricle toward the tissues of a dog. Which vessel receives it immediately after the aortic valve?

    1. A. Pulmonary trunk
    2. B. Pulmonary vein
    3. C. Aorta
    4. D. Caudal vena cava

    Answer: C

    Explanation: The stated flow sequence is "left ventricle, aortic valve, aorta, body (systemic circulation)." Thus blood enters the aorta after crossing the aortic valve.

    Reference: The Cardiovascular System in Animals — Introduction; Heart Rate and the Electrocardiogram; Hindrance to Blood Flow