Intestinal Absorption
PTH raises calcium by increasing bone resorption, renal calcium reabsorption and 1α-hydroxylation of vitamin D (more intestinal absorption), and it lowers phosphate by increasing its excretion.
What our notes say
- PTH raises calcium by increasing bone resorption, renal calcium reabsorption and 1α-hydroxylation of vitamin D (more intestinal absorption), and it lowers phosphate by increasing its excretion. (Chemical Pathology Practice Examination)
- Intestinal Absorption: Through its effect on vitamin D, PTH indirectly increases calcium absorption from the gastrointestinal tract. (MEDICAL PHYSIOLOGY II ESsays)
Practice questions on Intestinal Absorption
Which statement is false about impaired intestinal absorption? ---
- Iron absorption decreases after stomach removal
- Iodide deficiency reduces thyroid size
- Water absorption decreases in infants unable to digest disaccharides
- Bile salt malabsorption occurs after terminal ileum removal
- Iodide deficiency reduces thyroid size (It causes enlargement , i.e., goiter.)
Answer: B.