The principal ions in extracellular fluid are sodium, chloride, ...

[clippers!]

The principal ions in extracellular fluid are sodium, chloride, and
 A) potassium.
  B) magnesium.
  C) phosphate.
  D) bicarbonate.
  E) iodine.

Question 2

Cardiac muscle layers form this distinct pattern.
 A) inner longitudinal layer
  B) outer longitudinal layer
  C) outer circular layer
  D) figure eight
  E) weave

[thall411]

Answer to Question 1

D

Answer to Question 2

D

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Thank you!

[thall411]

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