Microfilaments are comprised of the protein ____________________
Fill in the blank(s) with correct word
actin
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Most visceral organs are innervated by only parasympathetic nerve fibers
a. True b. False Indicate whether the statement is true or false
Neurons have the characteristics of irritability and the ability to contract.?
Indicate whether the statement is true or false
Which of the following events is not observed in the ECG, because it is hidden in the QRS complex?
A. Atrial systole B. Ventricular repolarization C. Atrial depolarization D. Ventricular depolarization E. Atrial repolarization
The pleurae are vital to the integrity of the lungs because ________.
A) they contain cilia that protect the lungs B) they control the volume of the lungs C) they maintain the proper temperature of the lungs during sleep D) they produce a lubricating serous secretion, allowing the lungs to glide over the thorax wall during breathing