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Author Question: Which is the area of specialized nervous tissue in the heart that is known as the pacemaker of the ... (Read 77 times)

asmith134

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on: Jun 27, 2018
Which is the area of specialized nervous tissue in the heart that is known as the pacemaker of the heart?
 
  A) Purkinje fibers
  B) sinoatrial node
  C) atrioventricular node
  D) bundle of His

Question 2

The intercostal muscles assist with what activity?
 
  A) raising the shoulder
  B) moving the arm
  C) breathing, coughing, or sneezing
  D) moving the neck


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yotaSR5

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Reply #1 on: Jun 27, 2018
Answer to Question 1

B
Explanation: A) The Purkinje fibers are not the pacemaker of the heart.
B) Correct
C) The atrioventricular node is not the pacemaker of the heart.
D) The bundle of His is not the pacemaker of the heart.

Answer to Question 2

C
Explanation: A) The intercostal muscles are in the chest, not the shoulder.
B) The intercostal muscles are in the chest, not the arm.
C) Correct
D) The intercostal muscles are in the chest, not the neck.


asmith134

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Reply 2 on: Jun 27, 2018
Great answer, keep it coming :)

dantucker

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Reply 3 on: Yesterday
Excellent

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