http://www.atrial-contractions.com/av-nodevalve-question/406/ Your Questions, Our Answers Sun, 01 Aug 2010 08:17:24 +0000 http://wordpress.org/?v=2.2.1 http://www.atrial-contractions.com/av-nodevalve-question/406/#comment-430 ford_dangerfield Tue, 09 Feb 2010 20:24:06 +0000 http://www.atrial-contractions.com/av-nodevalve-question/406/#comment-430 a FALSE. Pace maker cells are in the SA node. b. TRUE. c. FALSE. they slow the signal down to give the ventricles time to fill after the atria have contracted. d. FALSE. The signal is conducted to the apex of the heart by the right and left bundle branches of His. contraction begins at the apex and works its way up, so as to squeeze the blood out! e. FALSE. Papillary muscles brace the AV valves, ventricular muscles drive blood flow. f. FALSE. Signals from the brain can only speed up or slow down the rate of heart beat, they don't tell the heart when to beat. a FALSE. Pace maker cells are in the SA node.
b. TRUE.
c. FALSE. they slow the signal down to give the ventricles time to fill after the atria have contracted.
d. FALSE. The signal is conducted to the apex of the heart by the right and left bundle branches of His. contraction begins at the apex and works its way up, so as to squeeze the blood out!
e. FALSE. Papillary muscles brace the AV valves, ventricular muscles drive blood flow.
f. FALSE. Signals from the brain can only speed up or slow down the rate of heart beat, they don’t tell the heart when to beat.

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