Which of the Following Statements Is TRUE of Oral Contraceptives

question 30

Multiple Choice

Which of the following statements is TRUE of oral contraceptives?

• A) The most common type of oral contraceptive contains both estrogen and progesterone.
• B) A significant risk of pregnancy exists even if oral contraceptives are taken as directed.
• C) They are effective only because they prevent ovulation.
• D) Full protection is provided by oral contraceptives after three days of use.

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Definitions:

Milliseconds

A unit of time equal to one thousandth of a second, often used to measure very short durations, especially in scientific contexts.

Absolute Refractory Period

A phase during which a neuron is incapable of firing again immediately after an action potential, ensuring the signal only moves in one direction.

Action Potentials

Quick, electrical impulses that travel down a neuron's axon, allowing neurons to communicate with each other.

Synaptic Interval

The gap between neurons across which neurotransmitters travel to transmit signals from one neuron to the next.