How do you determine the net effect of two muscle pulls applied to the same spot? What is this process called?
What will be an ideal response?
ANS: You find the resultant pull of the two forces by drawing the two forces, creating a parallelogram by
adding sides parallel to each of the forces, and drawing a diagonal within the parallelogram. The
resultant is the diagonal with its point of application at the original source and whose arrow head
(limit of magnitude) is at the opposite corner of the parallelogram. This is called composition of
forces.
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Which of the following pulmonary function devices directly collect and measure gas volumes? 1. Water-sealed spirometer 2. Dry rolling-seal spirometer 3. Bellows spirometer 4. Pneumotachometer
a. 3 and 4 only b. 1 and 2 only c. 1, 2, and 3 only d. 2, 3, and 4 only
Smooth muscle relaxation most likely occurs as a result of
a. a decrease in intracellular cAMP. b. an increase in intracellular cAMP. c. an increase in ATP. d. a decrease in ATP.
The combining form for gall or bile is:
a. cole/o.
b. chole/o.
c. col/o.
d. colp/o.