Which portion(s) of the cardiac conduction system is/are found in the right atrium of the heart?

A) SA node and AV node
B) AV bundle and the bundle branches
C) Purkinje fibers
D) AV bundle
E) SA node

Which artery transports blood from the brachial vein to the subclavian vein?

A) Axillary vein
B) Basilic vein
C) Cephalic vein
D) Median cubital vein
E) Thyrocervical vein

Which of the following factors is likely to a mutation and possibly cancer?

A) X-rays
B) ultraviolet radiation
C) cigarette smoke
D) pesticides
E) All of the answer choices can lead to cancer.