The ________ is the pacemaker that initiates each heart beat.
A. atrioventricular (AV) node
B. autonomic nervous system
C. sinoatrial (SA) node
D. cardiac conduction system
E. sympathetic division of the nervous system
Answer: C
Anatomy & Physiology
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Approximately what percent of the oxygen in blood is transported by the hemoglobin of erythrocytes?
A. 33% B. 50% C. 66% D. 75% E. 98%
Anatomy & Physiology
Due to the branching of arteries the type of arteries that would be most numerous would be ________
A) arterioles B) pulmonary arteries C) muscular arteries D) elastic arteries
Anatomy & Physiology
The gonads appear as the ________.
A. urogenital folds B. labioscrotal swellings C. gonadal grooves D. gonadal ridges E. paramesonephrons
Anatomy & Physiology
Explain the impact on a synovial joint that has sustained damage to the articular cartilage
What will be an ideal response?
Anatomy & Physiology