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Flashcards in Magnesium Deck (18)
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1
Q

What is the function of magnesium?

A

it is a cofactor to activate enzymes involved in catabolism and anabolism, vital to the maintenance of normal nerve and muscle stability

2
Q

What are plasma magnesium levels?

A

1.8-2.4 mg/dL

3
Q

What are dietary sources of magnesium?

A

grains, oilseed meals, forage grasses, and forage legumes

4
Q

What are synthetic sources of magnesium?

A

magnesium oxide, magnesium sulfate, magnesium carbonate, magnesium hydroxide

5
Q

What is hypomagnesemia?

A

tetany

6
Q

What is hypermagnesemia?

A

slow reaction time

7
Q

How do we know that an animal is magnesium deficient?

A

their plasma levels fall below the renal threshold

8
Q

What is normal plasma Mg concentration dependent on?

A

daily dietary Mg absorption

9
Q

What species group most commonly has Mg issues?

A

ruminants

10
Q

What is Mg absorption in ruminants dependent on?

A

the concentration in rumen fluid, and the integrity of the rumen active transport mechanism

11
Q

What can block rumen transport of Mg?

A

potassium in forages

12
Q

How can a Mg deficiency be overcome in ruminants?

A

adding Mg to the diet in a highly soluble form to utilize passive diffusion

13
Q

What is hypomagnesemic tetany?

A

Grass tentany caused by magnesium deficiency

14
Q

What species is grass tetany common in?

A

cows, sheep, and goats

15
Q

What cows is grass tetany usually observed in?

A

lactating beef or dairy animals at pasture

16
Q

Why are lactating cows susceptible to grass tetany?

A

because lactation increases the demand for Mg

17
Q

What are symptoms of grass tetany?

A

hyperexcitable nerves, muscle tremors, nystagmus, convulsons

18
Q

How do you prevent struvite formation in cats?

A

limit Mg, or acidify the diet