Topics:
Animal Physiology, Animal Refresher
Characteristics of Diabetes Insipidus
Diabetes insipidus is characterized by:
- Polyuria only
- Polydipsia only
- Both Polyuria and Polydipsia — Correct Answer
- Polyphagia and Glycosuria
Explanation:
Correct Answer: Both Polyuria and Polydipsia
Diabetes Insipidus (DI) is caused by deficiency of ADH (Antidiuretic Hormone/Vasopressin). The kidney fails to reabsorb water, leading to massive urine output and compensatory thirst.
Diabetes Insipidus vs. Diabetes Mellitus
| Feature | Diabetes Insipidus | Diabetes Mellitus |
|---|---|---|
| Cause | Deficiency of ADH | Deficiency of insulin |
| Blood glucose | Normal | High (Hyperglycemia) |
| Urine glucose | Absent (Glucose-free) | Present (Glycosuria) |
| Urine output | Polyuria ✔ | Polyuria ✔ |
| Thirst | Polydipsia ✔ | Polydipsia ✔ |
| Appetite | Normal | Polyphagia (increased) |
| Urine specific gravity | Lower than normal | Higher than normal |
Types of Diabetes Insipidus
- Neurogenic (Central) DI: Deficiency of ADH secretion from the posterior pituitary.
- Nephrogenic DI: Kidneys do not respond normally to ADH (receptor defect).
📚 About this Topic — Animal Physiology
This multiple choice question is from Animal Physiology, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Physiology to strengthen your preparation.
