Why might you purposely yawn when you descend to land while flying in an airplane?
What will be an ideal response?
ANSWER: 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...
There are many molecular techniques to identify taxonomy of microorganisms. Match each technique to its proper resolution.
A. Mole % G+C B. 16S rDNA sequencing C. Genomic fingerprinting D. Genome sequencing
An atom with more electrons than protons is called
a(n) __________. Fill in the blank(s) with the appropriate word(s).
What is the fate of metabolites during respiration?
a. They are oxidized completely to carbon dioxide and water. b. They are reduced to from NADH and FADH2. c. They are oxidized completely to form pyruvic acid. d. They are rearranged to form GTP.
If a scientist is conducting a study of how a male bird's song and the female bird's response evolved, what type of causation is she exploring?
A. ethnological causation B. fixed action pattern causation C. proximate causation D. ultimate causation E. stereotyped causation