Identify the two types of capillaries with a complete endothelium
A) continuous capillaries and fenestrated capillaries
B) fenestrated capillaries and sinusoidal capillaries
C) continuous capillaries and sinusoidal capillaries
D) fenestrated capillaries and lacteals
E) sinusoidal capillaries and collaterals
Answer: A
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a. True b. False Indicate whether the statement is true or false
Why can't tetany of the heart occur?
a. there are no distinct motor units in the heart. b. there is inadequate oxygen supply via the coronary circulation to metabolically support a sustained contraction. c. the refractory period in cardiac muscle lasts almost as long as the duration of the resultant contraction. d. the heart contracts with maximal force every beat so it is impossible to increase the strength of cardiac contraction. e. vagal stimulation slows down the heart rate to prevent summation of contractions.
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