Feedback: In order to maintain a stable internal environment, or homeostasis, the body uses negative and positive feedback. In negative feedback, the body works to correct a deviation from a set point, it tries to get back to normal. Examples include body temperature, blood pressure, blood oxygen levels, and thirst sensation. In positive feedback, the body changes from the normal point and amplifies it. Examples include blood clot formation, lactation, contractions during childbirth, and fever.
- Felty syndrome
A complication of long-standing rheumatoid arthritis characterized by the presence of 3 conditions — rheumatoid arthritis, an enlarged spleen (splenomegaly), and an abnormally low white blood cell count. The white blood cells that are low are called granulocytes (or neutrophils). Felty syndrome predisposes to infections such as pneumonia or skin infections, because of the low […]
- Felty's syndrome
FEMA: A name well known to people in the US who have experienced a major natural or made-man disaster. FEMA stands for Federal Emergency Management Agency.
Female: The traditional definition of female was “an individual of the sex that bears young” or “that produces ova or eggs”. However, things are not so simple today. Female can be defined by physical appearance, by chromosome constitution (see Female chromosome complement), or by gender identification. Female chromosome complement: The large majority of females have […]
- Female condom
Female condom: Although the word “condom” usually conjures up the male condom, there is a female condom. The Reality Female Condom was approved by U.S. Food and Drug Administration (FDA) in April 1993. It consists of a lubricated polyurethane sheath shaped similarly to the male condom. The closed end, which has a flexible ring, is […]