Which of the following factors keeps the alveoli expanded?
A. a pneumothorax
B. negative pleural pressure
C. alveolar pressure being equal to atmospheric pressure
D. a reduction in surfactant
E. negative intra-alveolar pressure
B
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The muscle that retracts and elevates the upper lip is the ________ muscle
A) orbicularis oculi B) zygomaticus minor C) orbicularis oris D) masseter E) buccinator
Which of the following descriptions best matches the term gastrin?
A) where pancreatic juice and bile enter duodenum B) carries absorbed sugars and amino acids C) stimulates pancreas to secrete bicarbonate-rich fluid D) causes gallbladder to contract E) stimulates gastric secretion
What are tendinous intersections?
A. Round tendonlike structures attaching muscle to bone B. Fibrous, perpendicular insertions between successive sheets or blocks of muscle C. Flat sheets of connective tissue used for muscle insertion D. Thin layers of muscle used to attach two other muscles together E. Narrow, vertical, fibrous strips used to attach muscle sheaths of the left and right rectus abdominis
The sympathetic and parasympathetic divisions of the ANS differ in the
A. length of the preganglionic and postganglionic axons. B. location of the preganglionic cell bodies. C. position of the ganglia where preganglionic and postganglionic neurons synapse. D. length of the preganglionic and postganglionic axons, and location of the preganglionic cell bodies. E. length of the preganglionic and postganglionic axons, location of the preganglionic cell bodies, and position of the ganglia where preganglionic and postganglionic neurons synapse.