Why might you purposely yawn when you descend to land while flying in an airplane?
What will be an ideal response?
Eustachian tubes protect the tympanic membrane (eardrum) from damage by changes in environmental
atmospheric pressure. The pressure changes associated with flying can be relieved by yawning or
swallowing because the tube opens. The tube opening allows air to flow into or out of the middle ear,
resulting in equalization of pressure on both sides of the eardrum.
You might also like to view...
How can one increase the rate of a chemical reaction?
A. Increase the activation energy needed. B. Cool the reactants. C. Decrease the concentration of the reactants. D. Add a catalyst. E. Increase the entropy of the reactants.
Which tissue is striated and can contract rapidly, producing voluntary movements?
a. skeletal muscle b. smooth muscle c. bone tissue d. cardiac muscle e. adipose tissue
In all animals, the largest percentage of the body's fluids are located in the:
A. intracellular compartment. B. plasma. C. hemolymph. D. extracellular compartment. E. interstitial fluid.
What are the cells that make up loose connective tissue?
A) fibroblasts B) osteocytes C) chondrocytes D) hepatocytes