An Obstetrician Is Giving a Talk About Teratogens

question 131

Multiple Choice

An obstetrician is giving a talk about teratogens. The doctor would state that damage from a given teratogen:

• A) is most likely to occur during the third trimester.
• B) is identical for every woman.
• C) is most likely to occur at high levels of exposure.
• D) always shows up soon after birth.

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Definitions:

Citric Acid Cycle

Cycle of reactions in mitochondria that begins with citric acid. This cycle breaks down an acetyl group and produces CO2, ATP, NADH, and FADH2; also called the Krebs cycle.

Prep Reaction

A phase in cellular respiration, often referring to the preparation steps that convert pyruvate for entry into the Krebs cycle.

Glycolysis

Anaerobic breakdown of glucose that results in a gain of two ATP and the production of pyruvate; occurs in the cytoplasm of cells.

Electron Transport Chain

A sequence of electron carrier molecules that transfer electrons and release energy used to make ATP, found in the inner mitochondrial membrane.