Which of the Following Is an Example of Negative Feedback

question 28

Multiple Choice

Which of the following is an example of negative feedback?

• A)During birthing contractions, oxytocin (a hormone)is released and acts to stimulate further contractions.
• B)When a baby is nursing, suckling leads to the production of more milk and a subsequent increase in the secretion of prolactin (a hormone that stimulates lactation).
• C)After a blood vessel is damaged, signals are released by the damaged tissues that activate platelets in the blood. These activated platelets release chemicals that activate more platelets.
• D)When the body temperature exceeds 37◦C the brain signals the release of sweat to cause evaporative cooling.
• E)When a neuron is about to transmit an impulse, opening of voltage-gated ion channels results in the opening of more channels.

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Definitions:

Thionyl Chloride

A reactive chemical compound with the formula SOCl2, widely used in organic synthesis for the conversion of carboxylic acids into acid chlorides.

Benzoic Acid

An aromatic carboxylic acid with the formula C6H5COOH, used in the manufacture of various esters and as a food preservative.

Methyl Acetate

A volatile, flammable liquid ester of acetic acid and methanol, used as a solvent in coatings, paints, and adhesives.

Acetyl Chloride

A colorless, corrosive liquid acyl chloride used as an acetylating agent in organic synthesis.