In which of the following situations is positive feedback necessary?

An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

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Approximately 25% of all reported medication errors result from some kind of name confusion.

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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

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People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Cell-wall structure of Gram-positive and Gram-negative bacteria.

The human birth process as an example of positive feedback.

Feedback control of the adrenal cortex

Negative feedback control of a regulated variable.

Flow data for a healthy donor (top panel) and a HIV positive patient. CD3 is a T-cell marker, CD4 is ...

Negative Feedback Regulation of BP

Author Question: In which of the following situations is positive feedback necessary? (Read 424 times)

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