1. “Heart of heart” is ________
a) SA node
b) AV node
c) Bundle of HIS
d) Purkinji fibers
View Answer
Answer: a
Explanation: “Heart of heart” is SA node.
2. Which of the following has the thickest wall?
a) Right ventricle
b) Left ventricle
c) Right atrium
d) Left atrium
View Answer
Answer: b
Explanation: Left ventricle has the thickest wall in the human heart.
3. Pacemaker is __________
a) AV node
b) SA node
c) Bundle of HIS
d) Ventricle muscles
View Answer
Answer: b
Explanation: Pacemaker is SA node. SA node is located in upper lateral wall of right atrium.
4. SA node is located in _____
a) upper lateral wall of right atrium
b) lower lateral wall of left atrium
c) lower lateral wall of right atrium
d) upper lateral wall of left atrium
View Answer
Answer: a
Explanation: SA node is located in upper lateral wall of right atrium.
5. “Bundle of HIS” is made up of _________
a) nervous tissue supplied to ventricles
b) nervous tissue supplied to heart
c) muscular tissue supplied to heart
d) muscular tissue supplied to ventricles
View Answer
Answer: d
Explanation: Bundle of HIS is made up of muscular tissue supplied to ventricles.