The gastroesophageal sphincter is normally closed to prevent
a. air from entering the esophagus during breathing
b. gastric contents from refluxing into the esophagus
c. vomiting
d. esophageal leaking into the stomach
e. food from entering the pharynx
B
You might also like to view...
Once oxygen leaves the capillary and crosses the muscle cell plasma membrane, it is rapidly bound by __________
Fill in the blank with the correct word.
A meniscus cushions articulating surfaces of bones
Indicate whether the statement is true or false
What is the average composition of the fecal waste material?
a. 60 percent water, 10 percent bacteria, 30 percent indigestible, and inorganic matter b. 45 percent water, 45 percent indigestible and inorganic matter, 10 percent bacteria c. 75 percent water, 5 percent bacteria, 20 percent indigestible materials, inorganic matter, and epithelial remains d. 20 percent water, 5 percent bacteria, 75 percent indigestible remains and inorganic matter
What feature of your ear accounts for its ability to regain its shape after it has been deformed or compressed?
A. The elastic fibers in the ear's skin that contract after being stretched B. The abundance of reticular fibers forming a dense meshwork C. The elastic fibers present in the ear's cartilage D. The elastic fibers present in the ear's muscles E. The ear's built-in memory based upon its overall size and shape