Topics:
Animal Physiology, Animal Refresher
Match Contents to Their pH Values
Match the column:
| TABLE-I (Contents) | TABLE-II (pH) |
|---|---|
| 1) Ruminal Content | a) 8.0 |
| 2) Abomasal Content | b) 7.4 |
| 3) Saliva of Ruminant | c) 2.0 |
| 4) Blood | d) 6.5–6.8 |
- 1-d, 2-c, 3-a, 4-b — Correct Answer
- 1-a, 2-b, 3-c, 4-d
- 1-c, 2-d, 3-b, 4-a
- 1-b, 2-a, 3-d, 4-c
Explanation:
Correct Answer: 1-d, 2-c, 3-a, 4-b
Correct pH matching:
- 1. Ruminal Content → d) 6.5–6.8: Normal rumen pH is 6.5–6.8 (slightly acidic; buffered by salivary bicarbonate against VFA acids). Falls to ~4.0 in severe grain engorgement.
- 2. Abomasal Content → c) 2.0: Abomasum (true stomach) is highly acidic (pH ~2.0) due to HCl secretion by parietal cells. This activates pepsinogen → pepsin and kills ingested microbes.
- 3. Saliva of Ruminant → a) 8.0: Ruminant saliva is strongly alkaline (pH ~8.0) — rich in NaHCO₃ and Na₂HPO₄. This alkaline saliva neutralizes VFAs in rumen to maintain rumen pH 6.5–6.8. Note: Ruminant saliva contains NO amylase.
- 4. Blood → b) 7.4: Normal blood pH = 7.4 (arterial). Venous blood pH = 7.36 (more acidic due to CO₂ transport as carbonic acid). Venous blood is more acidic than arterial blood.
📚 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.
