Question

Process of release gas from digestive tract through mouth is

• A. Rumination
• B. Eructation
• C. Swallowing
• D. Mastication

Hint:

Failure of the eructation mechanism in ruminants leads to the accumulation of gas in the rumen, causing a life-threatening condition known as tympany or bloat.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
During microbial fermentation in the forestomachs of ruminants, large volumes of gases (primarily carbon dioxide and methane) are continuously produced and must be expelled to prevent clinical bloating.

Step 3: Detailed Explanation:
The physiological mechanism of expelling gas from the rumen and reticulum up through the esophagus and out of the mouth is called eructation (commonly known as belching).
It is coordinated by sensory inputs detecting gas pressure in the dorsal sac of the rumen, inducing a synchronized contraction sequence of the forestomachs.
Let us review the other choices:
- Rumination: The process of regurgitating, re-chewing, re-salivating, and re-swallowing fibrous ingesta (often called "chewing the cud").
- Swallowing (Deglutition): The transport of food or liquid from the mouth to the stomach.
- Mastication: The mechanical breakdown of food by chewing in the oral cavity.

Step 4: Final Answer
The release of gas from the digestive tract through the mouth is termed eructation.