What is the primary mechanism for the absorption of calcium ions?
Understand the Problem
The question is asking for the main method by which calcium ions are absorbed in biological systems, specifically focusing on the mechanisms of transport across cell membranes.
Answer
The active transcellular process.
The primary mechanism for the absorption of calcium ions is the active transcellular process occurring in the duodenum.
Answer for screen readers
The primary mechanism for the absorption of calcium ions is the active transcellular process occurring in the duodenum.
More Information
Calcium absorption primarily occurs in the duodenum via an active, transcellular process. This mechanism is regulated by various factors including vitamin D levels, which enhance calcium absorption by increasing the synthesis of calcium-binding proteins.
Tips
A common mistake is to assume that calcium absorption is solely dependent on dietary intake, while it also greatly depends on physiological conditions such as vitamin D levels.
Sources
- Calcium Absorption - an overview | ScienceDirect Topics - sciencedirect.com
- Mechanisms of intestinal calcium absorption - PubMed - pubmed.ncbi.nlm.nih.gov
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