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    Biology
  3. Study Set
    Biology Today and Tomorrow
  4. Exam
    Exam 21: Circulation and Respiration
  5. Question
    The SA Node
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The SA Node

Question 1

Question 1

Multiple Choice

The SA node


A) generates excitatory signals for muscle contraction.
B) is under voluntary control.
C) receives electrical signals from the AV node.
D) is located in the right atrium.
E) is all of these.

Correct Answer:

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