The utricle contains vertically arranged maculae that would provide feedback on body movement in the vertical plane. The maculae utriculi are stimulated during linear acceleration in the transverse plane. An example of linear acceleration would include sitting in a wheeled chair and having someone push you from behind. An example of angular acceleration would be sitting in a chair and having someone spin you in a circle. Each of the semicircular canals is specially positioned to detect angular acceleration in one of the three planes. When someone is standing still, the kinocilia of the macula sacculi are bending inferiorly and thus conveying information regarding one's static equilibrium. The concept of dynamic equilibrium can be exemplified by any acceleration, or change in velocity.
Utricle: A sac-like structure in the inner ear that contains a macula, which is a sensory organ that helps to detect linear acceleration.
Macula utriculi: A sensory organ in the utricle that helps to detect linear acceleration.
Linear acceleration: A change in velocity in a straight line.
Dynamic equilibrium: The ability to maintain balance when the body is moving.
Semicircular canals: Three fluid-filled tubes in the inner ear that help to detect angular acceleration.
Crista ampularis: A sensory organ in the semicircular canals that helps to detect angular acceleration.
Angular acceleration: A change in velocity in a circular path.
Static equilibrium: The ability to maintain balance when the body is not moving.
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The theory of natural selection
The cell theory
Theory of extinctions
B. Chemical energy is stored when bonds in ATP are broken to form ADP.
C. Chemical energy is released when bonds in ADP are broken to form ATP.
D. Chemical energy can only be stored as ADP.
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