Author Question: In the renal system, which mineral regulates body fluid pH by reacting with secreted hydrogen ions, ... (Read 68 times)

fasfsadfdsfa

  • Hero Member
  • *****
  • Posts: 554
In the renal system, which mineral regulates body fluid pH by reacting with secreted hydrogen ions, releasing sodium ions in the process?
 A) sulphur
  B) magnesium
  C) calcium
  D) phosphorus

Question 2

List the factors that increase the risk for vitamin B12 and iron deficiency in older adults.



princessflame2016

  • Sr. Member
  • ****
  • Posts: 298
Answer to Question 1

D

Answer to Question 2

An estimated 10 to 30 percent of adults older than 50 have atrophic gastritis; these people are particularly vulnerable to vitamin B12 deficiency. The bacterial overgrowth that accompanies this condition uses up the vitamin, and without hydrochloric acid and intrinsic factor, digestion and absorption of vitamin B12 are inefficient. Given the poor cognition, anemia, and devastating neurological effects associated with a vitamin B12 deficiency, an adequate intake is imperative. The iron needs of men remain unchanged throughout adulthood. For women, iron needs decrease substantially at menopause when blood loss through menstruation ceases. Consequently, iron-deficiency anemia is less common in older adults than in younger people. Nevertheless, iron deficiency may develop in older adults, especially when their food energy intakes are low. Aside from diet, two other factors may lead to iron deficiency in older people: chronic blood loss from diseases and medicines and poor iron absorption due to reduced stomach acid secretion and antacid use. Iron deficiency impairs immunity and leaves older adults vulnerable to infectious diseases. Anyone concerned with older people's nutrition should keep these possibilities in mind.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

Did you know?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Did you know?

The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

For a complete list of videos, visit our video library