Multiple Choice
Electrical signals move through the mammalian heart in a particular order.Which order is correct?
A) SA node;internodal pathway;AV node;bundle of His;Purkinje fibers
B) AV node;SA node;internodal pathway;bundle of His;Purkinje fibers
C) SA node;AV node;internodal pathway;Purkinje fibers;bundle of His
D) bundle of His;Purkinje fibers;internodal pathway;AV node;SA node
Correct Answer:

Verified
Correct Answer:
Verified
Q20: The vertebrate heart muscle is known as<br>A)pericardium.<br>B)epicardium.<br>C)myocardium.<br>D)endocardium.
Q21: In most non-crocodilian reptiles,the ventricle is divided
Q22: Which of the following is NOT one
Q23: The rising phase of a cardiac pacemaker
Q24: The contractility of the heart can be
Q26: What is hydrostatic pressure?<br>A)pressure exerted by a
Q27: What is believed to be the major
Q28: What types of blood cells are involved
Q29: The direct connection between two arteries in
Q30: Sponges do not have a true circulatory