Molecules Called Uncouplers Allow Protons to Cross the Inner Mitochondrial

question 9

Multiple Choice

Molecules called uncouplers allow protons to cross the inner mitochondrial membrane.What effect would this have on ATP production in the mitochondria?

• A)Reduction, because electrons would not be able to move through the electron transport chain
• B)Reduction, because protons would not be available to pass through the ATPase
• C)No effect, because protons cross the outer mitochondrial membrane to produce ATP
• D)Increase, because this would spontaneously establish a proton gradient
• E)Increase, because this would make more oxygen available in the mitochondrial matrix

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Definitions:

Hans Selye

A pioneering Hungarian-Canadian endocrinologist known for his research on the stress response and for introducing the concept of "General Adaptation Syndrome".

Physiological Arousal

A state of physical alertness or excitement, which can be triggered by emotions, thoughts, or external stimuli, affecting bodily functions.

Fight-or-flight Response

A physiological reaction that occurs in response to a perceived harmful event, attack, or threat to survival.

Walter Cannon

A physiologist who coined the term "fight or flight" to describe the body's response to stress, and made significant contributions to understanding the autonomic nervous system.