VFA with Maximum Absorption Rate

Question Question

Which VFA (Volatile Fatty Acid) has the maximum absorption rate from the rumen wall?

Select an answer

Acetate
Propionate
Butyrate
All are absorbed equally

VFA with Maximum Absorption Rate

Which VFA (Volatile Fatty Acid) has the maximum absorption rate from the rumen wall?

Options

Acetate
Propionate
Butyrate ✓
All are absorbed equally

Correct Answer: C

Explanation in English

Correct Answer: Butyrate

The order of VFA absorption rate from the rumen wall is: Butyrate > Propionate > Acetate

Butyrate (4C) is the most lipid-soluble of the three main VFAs and is preferentially absorbed by rumen epithelial cells, where it is converted to β-hydroxybutyrate before entering the bloodstream.

Mechanism

VFA absorption occurs by passive diffusion — only the undissociated (protonated) form crosses the lipid membrane. Lipid solubility increases with chain length: Butyrate > Propionate > Acetate.

VFA Quick Reference

Ratio: Acetate 65% : Propionate 20% : Butyrate 10%
ATP: Acetate 10, Propionate 17, Butyrate 25
Milk fat → Acetate; Glucose/Lactose → Propionate; Ketone bodies → Butyrate

📚 About this Topic — Animal Nutrition

This multiple choice question is from Animal Nutrition, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Nutrition to strengthen your preparation.

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