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Title: Compared to a normal diaphragm, contraction of a diaphragm that is low and flat may result in which ... Post by: yadwinder on Feb 25, 2018 Compared to a normal diaphragm, contraction of a diaphragm that is low and flat may result in which of the following?
a. Compression of the thoracic cavity b. Enhanced venous return and thus cardiac output c. Greater diaphragmatic efficiency d. Larger than normal change in thoracic volume Q. 2 Which of the following muscles are considered primary muscles of ventilation? 1. Diaphragm 2. Intercostals 3. Scalenes 4. Sternomastoid a. 1, 3, and 4 b. 1 and 2 c. 3 only d. 1, 2, 3, and 4 Q. 3 What are rib pairs 11 and 12 known as? a. False ribs b. Faux ribs c. Floating ribs d. True ribs Q. 4 What does the pump handle movement of rib pairs 2 through 7 achieve? a. Anchor of the upper chest for diaphrag-matic contraction b. Diminish of the energy wasted by ineffi-cient muscular contraction c. Increase in the anteroposterior diameter of the chest d. Increase in the lateral dimensions of the chest Q. 5 The intercostal arteries, veins, and nerves run through which of the following? a. Costal groove on the top of each rib b. Costal groove on the bottom of each rib c. Fibers of the intercostal musculature d. Surface of the parietal pleura Q. 6 Which of rib pairs connect directly to the sternum? a. 1 through 4 b. 1 through 7 c. 1 through 12 d. 11 through 12 Title: Compared to a normal diaphragm, contraction of a diaphragm that is low and flat may result in which ... Post by: geraldmanullang on Feb 25, 2018 Increased lung volume causes the diaphragm to flatten out. Contraction of a flattened diaphragm can result in tension on the lower ribs that causes them to be pulled inward, which results in compression of the thoracic cavity. This condition can occur in individuals with severe gas trap-ping as a result of emphysema or asthma. To compensate for this, these individuals must recruit other muscles to enlarge the thorax. This results in less efficient breathing and excessive muscle work. The diaphragm and intercostal muscles are the primary muscles of ventilation. Rib pairs 11 and 12 are called floating ribs because they are not attached to the sternum. Ribs 2 through 7 move simultaneously about two axes (Figure 9-20). As each rib rotates about the axis of its neck, its sternal end rises and falls. This movement increases the anteroposterior thoracic diameter in what is commonly referred to as a pump handle-like motion. Just below each rib are a thoracic artery, vein, and nerve that supply blood flow and nerve com-munications to that region of the chest wall (Figure 9-17). Rib pairs 1 through 7 are known as the true ribs because they are attached directly to the sternum. Title: Compared to a normal diaphragm, contraction of a diaphragm that is low and flat may result in which ... Post by: yadwinder on Feb 25, 2018 Thank you soooo very much, it was really helpful and kind of you to answer my q's
Title: Compared to a normal diaphragm, contraction of a diaphragm that is low and flat may result in which ... Post by: geraldmanullang on Feb 25, 2018 You're welcome, once again
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