Veterinary Physiology exam questions: topics, study tips and free sample questions
Updated 20 October 2026
Veterinary Physiology on the BCSE covers normal function of the body systems: cardiovascular, respiratory, renal, gastrointestinal, endocrine, neurological and reproductive physiology, and acid-base balance.
Topics to know in physiology
- Cardiac cycle and blood pressure control
- Respiratory mechanics and gas exchange
- Renal handling of water and electrolytes
- Acid-base balance
- Endocrine feedback and digestion in monogastrics and ruminants
How to study physiology for the BCSE
- Draw each feedback loop once.
- Tie each mechanism to a disease that breaks it.
- Practise acid-base questions with a fixed step-by-step method.
- Read every explanation and add questions you miss to a list you clear to zero.
Free physiology sample questions
Try these practice questions. Open each one to see the answer and the explanation. They are for study only. These are not official exam questions.
Question 1. Where can subcutaneous (SC or SQ) injections be given in any veterinary species?
- Dorsal midline from the point of the scapula to the wings of the ilium
- Anywhere the skin can be lifted and tented
- Only along the ventrum
- Lateral neck
- Lateral upper rear leg
Show the answer and explanation
Answer: B. Subcutaneous (SC or SQ) injections may be administered anywhere the skin can be lifted and tented. A common site is over the shoulders. Medications administered subcutaneously are absorbed more slowly as compared to those given IV or IM. Commonly administered SC therapeutic agents include vaccines, local anesthetics, and small volumes of other medications. Subcutaneous is also a preferred route for fluid administration by owners at home in small animals, in which a relatively small volume administered can be helpful (for example, in cats with chronic renal failure).
Question 2. Which pH is normal for the urine of herbivores?
- Alkaline
- Neutral
- Depends on breed
- Depends on diet
- Acidic
Show the answer and explanation
Answer: A. Alkaline. Acidic urine is found in animals that eat high-protein meat-based or milk-based diets. It is also found in herbivores and carnivores that are completely anorexic.
Question 3. What is the pathophysiologic mechanism thought to cause ruminal parakeratosis in sheep and cattle?
- Vitamin E, selenium imbalance in fastest growers
- Copper deficiency
- Subclinical nonprotein nitrogen toxicosis
- Secondary to chronic vagal indigestion
- Low roughage, high-concentrate diet
Show the answer and explanation
Answer: E. Ruminal parakeratosis in cattle and sheep is characterized by hardening and enlargement of the rumen papillae. It is believed to be caused by lowered pH and increased volatile fatty acids (VFAs) in the rumen juice due to a high-concentrate, low roughage diet.
Frequently asked questions
How many physiology questions are on the BCSE?
Pharmacology, physiology and toxicology together have a published range of about 28 to 32 questions.
How should I study physiology for the BCSE?
Draw each feedback loop once. Tie each mechanism to a disease that breaks it. Practise acid-base questions with a fixed step-by-step method.
Where can I practise physiology questions?
VetQ has 464 physiology practice questions, including 24 with images, with explanations. You can try it free for 48 hours.
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