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2. Stimulus modality - Wikipedia

   en.wikipedia.org/wiki/Stimulus_modality

   The stimulus modality for hearing is sound. Sound is created through changes in the pressure of the air. As an object vibrates, it compresses the surrounding molecules of air as it moves towards a given point and expands the molecules as it moves away from the point. Periodicity in sound waves is measured in hertz. Humans, on average, are able ...

3. Stimulus (physiology) - Wikipedia

   en.wikipedia.org/wiki/Stimulus_(physiology)

   Examples of mechanoreceptors include baroreceptors which detect changes in blood pressure, Merkel's discs which can detect sustained touch and pressure, and hair cells which detect sound stimuli. Homeostatic imbalances that can serve as internal stimuli include nutrient and ion levels in the blood, oxygen levels, and water levels.

4. Glossary of biology - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_biology

   This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.It is intended as introductory material for novices; for more specific and technical definitions from sub-disciplines and related fields, see Glossary of cell biology, Glossary of genetics, Glossary of evolutionary biology, Glossary of ecology ...

5. Biology - Wikipedia

   en.wikipedia.org/wiki/Biology

   The NADPH and ATPs generated by the light-dependent reactions in the second and third stages, respectively, provide the energy and electrons to drive the synthesis of glucose by fixing atmospheric carbon dioxide into existing organic carbon compounds, such as ribulose bisphosphate (RuBP) in a sequence of light-independent (or dark) reactions ...

6. Speed of sound - Wikipedia

   en.wikipedia.org/wiki/Speed_of_sound

   For instance, sound will travel 1.59 times faster in nickel than in bronze, due to the greater stiffness of nickel at about the same density. Similarly, sound travels about 1.41 times faster in light hydrogen gas than in heavy hydrogen gas, since deuterium has similar properties but twice the density. At the same time, "compression-type" sound ...

7. AOL

   search.aol.com

   The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.

8. Cell (biology) - Wikipedia

   en.wikipedia.org/wiki/Cell_(biology)

   Molecular Biology of the Cell (6th ed.). Garland. ISBN 978-0815344322. Archived from the original on 2014-07-14; The fourth edition is freely available Archived 2009-10-11 at the Wayback Machine from National Center for Biotechnology Information Bookshelf. Lodish, Harvey; et al. (2004). Molecular Cell Biology (5th ed.). New York: WH Freeman.

9. Aether (classical element) - Wikipedia

   en.wikipedia.org/wiki/Aether_(classical_element)

   According to ancient and medieval science, aether (/ ˈ iː θ ər /, alternative spellings include æther, aither, and ether), also known as the fifth element or quintessence, is the material that fills the region of the universe beyond the terrestrial sphere. [1]