Which of the following is not part of the cardiac conduction system?
A. Atrioventricular (AV) node
B. Subendothelial conducting network
C. Tendinous cords
D. Sinoatrial (SA) node
E. Atrioventricular (AV) bundle (bundle of His)
Answer: C
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If there is a complete block between the SA node and the AV node, how would the ECG be affected?
A) The P-R interval will be shorter. B) The QRS duration will be longer. C) There will be much bigger P waves. D) The ventricles will stop beating. E) The rate of P waves will be faster than the rate of QRS complexes.
Changes in pH and PCO2 alter the shape of the oxygen equilibrium curve for the respiratory pigments in many species, a phenomenon termed the __________
Fill in the blank with correct words.
Digestion of carbohydrates within the small intestine involves enzymes that come from thea: mouth.b: stomach.c: pancreas.d: lining of the small intestine.
A. a, d B. a, b C. b, c D. c, d E. a, b, c, d
How many sperm are produced from one spermatogonium?
A. One B. Two C. Four D. Eight