Digestion: Absorption
Vitamin B12 absorption in ileum requires which glycoprotein?
Select the correct option:
🔒 Solution Hidden from View
Submit your answer to unlock the detailed step-by-step solution.
More human physiology Practice Questions
Following a carbohydrate-rich meal, blood glucose rises sharply; the pancreatic hormone secreted to ...
Following a carbohydrate-rich meal, blood glucose rises sharply; the pancreatic hormone secreted to ...
Inside red blood cells carbon dioxide is converted to bicarbonate, and chloride ions move inward to ...
Inside red blood cells carbon dioxide is converted to bicarbonate, and chloride ions move inward to ...
In a standard electrocardiogram recorded from a healthy individual, the QRS complex of the tracing p...
In a standard electrocardiogram recorded from a healthy individual, the QRS complex of the tracing p...
According to the sliding filament theory of muscle contraction, the observable shortening of a sarco...
According to the sliding filament theory of muscle contraction, the observable shortening of a sarco...
The resting neuronal membrane maintains a particular distribution of ions, being relatively impermea...
The resting neuronal membrane maintains a particular distribution of ions, being relatively impermea...
Given that a heart ejects a stroke volume of 70 mL with each beat while beating 72 times every minut...
Given that a heart ejects a stroke volume of 70 mL with each beat while beating 72 times every minut...
During the cross-bridge cycle in skeletal muscle, the regulatory protein that blocks myosin-binding ...
During the cross-bridge cycle in skeletal muscle, the regulatory protein that blocks myosin-binding ...
A fall in blood pressure within the afferent arteriole stimulates a specialised cellular complex of ...
A fall in blood pressure within the afferent arteriole stimulates a specialised cellular complex of ...
A patient suffers from a progressive autoimmune disorder in which fatigue and weakness of skeletal m...
A patient suffers from a progressive autoimmune disorder in which fatigue and weakness of skeletal m...
Considering that both kidneys together form filtrate at roughly 125 mL per minute, approximately wha...
Considering that both kidneys together form filtrate at roughly 125 mL per minute, approximately wha...
At a chemical synapse between two neurons, transmission of the nerve impulse from one cell to the ne...
At a chemical synapse between two neurons, transmission of the nerve impulse from one cell to the ne...
A deficiency in the secretion of a particular posterior pituitary hormone leads to the production of...
A deficiency in the secretion of a particular posterior pituitary hormone leads to the production of...
About This Question
- Subject
- biology
- Chapter
- human physiology
- Topic
- digestion: absorption
- Difficulty
- Hard
- Year
- 2025
Solution
Correct Answer:
Intrinsic factor
- Vitamin B12 (Cyanocobalamin): Essential for RBC formation; absorption is complex.
- Stomach Phase: Parietal cells of the stomach secrete a glycoprotein called Intrinsic Factor (IF).
- Binding: Intrinsic factor binds to Vitamin B12 in the small intestine, protecting it from digestion.
- Ileal Phase: The IF−B12 complex is recognized by specific receptors in the terminal ileum (the last part of the small intestine), where absorption occurs.
- Deficiency: Lack of Intrinsic Factor leads to Vitamin B12 deficiency and Pernicious Anemia.
This hard difficulty biology question is from the chapter human physiology, covering the topic of digestion: absorption. It appeared in the 2025 exam.
Looking for more practice? Explore all biology questions or browse human physiology questions on RankGuru.