Which portion(s) of the cardiac conduction system is/are found in the right atrium of the heart?
A. AV bundle and the bundle branches
B. SA node
C. SA node and AV node
D. AV bundle
E. Purkinje fibers
Answer: C
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Which T cell toxin fragments DNA?
a) Perforin b) Tumor antigen c) Interferons d) Lymphotoxin e) Toxin T
The many stacks of membranes found inside chloroplasts are known as ____
a. granum b. cristae c. chlorophyll d. xanthophyll
Which of the following is NOT a characteristic of a catalyst?
A. It can change the final result of the reaction. B. It is not changed itself at the end of the reaction. C. It increases the rate of the reaction. D. It does not change the nature of the reaction.
The tendon reflex is the inhibition of a muscle's contraction that occurs when its tendon is excessively stretched.
Answer the following statement true (T) or false (F)