Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
15 Cards in this Set
- Front
- Back
|
What are minerals?
|
naturally occurring elements that cannot be made by living systems
|
|
|
List some properties of minerals
|
do not supply energy
act as co-factors to enzymes catalysts in association with enzymes vital constituents of all cells regulate osmotic pressure maintain correct acid/base balance |
|
|
Nutritionally, what 2 groups do minerals belong to?
|
macrominerals
trace minerals |
|
|
List some macrominerals
|
calcium
magnesium sodium potassium phosphorus chlorine sulphur |
|
|
For a mineral to be absorbed in the small intestine, it must:
|
be soluble and present itself as a singular molecule or as an ionic entity
|
|
|
What does silica form bonds with?
|
oxygen, hydrogen, nitrogen, and carbon
|
|
|
Where does absorption of orthosilicic acid occur?
|
in the proximal small intestine
|
|
|
what are some factors inhibiting absorption of silica?
|
high fibre intake
reduced gastric output |
|
|
What are some factors enhancing absorption of silica?
|
low calcium intake
|
|
|
How is silica transported in the body?
|
unknown, but not bound to a protein.
|
|
|
Where is silica distributed and stored in the body?
|
connective tissue of the aorta, trachea, tendons, nails, hair, bones, and skin. Highest amount found in the fingernails
|
|
|
How is silica excreted?
|
via the urine
|
|
|
What are the primary functions of silica?
|
it assists in the synthesis and stabilisation of collagen
it has an integral role in glycoaminoglycans, polysaccharides, and mucopolysaccharides |
|
|
What are some nutritional sources of silica?
|
drinking water
beer plant derived foods mussels |
|
|
Are there any toxicity issue with silica?
|
high levels of silicate containing drugs could cause damage to renal tubules and renal stones
|
