A chemical that minimizes changes in the pH of a body fluid by ...

[misspop]

A chemical that minimizes changes in the pH of a body fluid by releasing or binding hydrogen ion is called a(n)
 A) electrolyte.
  B) acid.
  C) alkali.
  D) compensation.
  E) buffer.

Question 2

Tetanic muscle contractions don't occur in a normal cardiac muscle because
 A) cardiac muscle tissue contracts on its own.
  B) neural stimulation is lacking.
  C) the refractory period lasts until the muscle relaxes.
  D) the refractory period ends before the muscle reaches peak tension.
  E) potassium channels outnumber sodium channels.

[mcni194]

Answer to Question 1

E

Answer to Question 2

C

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[mcni194]

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