People Who Suffer from Chronic Fatigue Syndrome (CFS) Experience Ongoing

question 26

Multiple Choice

People who suffer from chronic fatigue syndrome (CFS) experience ongoing, debilitating fatigue. In one study, cortisol levels in the saliva during the first hour after waking were measured and compared between CFS patients and people without CFS (controls) . The data is summarised in the graph. What can you infer from the data?

• A) A disruption to thyroid hormone production likely results in decreased cortisol in the saliva.
• B) Cortisol is lower in CFS patients because they were just woken up.
• C) The normal elevation in adrenocorticotropic hormone level in waking people is reduced in CFS patients.
• D) CFS patients are generally more relaxed as demonstrated by their decreased stress response.

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Definitions:

Teratogens

Agents or factors that cause malformation of an embryo or fetus, including certain drugs, infections, and chemicals.

Embryonic Stage

The period during pregnancy from the second to the eighth week post-conception, when significant growth and development of the embryo occur.

Gestation

The period of time a fetus develops inside the mother's womb or uterus, typically lasting about 40 weeks in humans from the last menstrual period.

Fetotoxins

Substances that are toxic to fetuses, potentially causing harm or developmental problems during pregnancy.