Histology
Quick practice
Question 1 of 5
A normal heart beats 70-80 times per minute. Which of the following structure generate the impulses in a normal heart?
A
Sympathetic nerves
B
Sinoatrial (SA) node
C
Atrioventricular (AV) node
D
Purkinje fibers
Concepts
Tissue Histology
Circulatory System
Lymphatic System
Integumentary System
Digestive System
Respiratory System
Urinary System
Male Reproductive System
Female Reproductive System
Special Senses
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