Physiology · Nervous System · Medium
Signal
Meaning: A chemical or electrical message that triggers a cellular or physiological response.
In practice: Hormonal signals travel in the blood to trigger distant target organs.
Quick check
Two questions on related physiology words.
Which word means: The passage of fluid through a membrane under pressure, e.g.
Answer: Filtration
Which word means: The paired organs of respiration that exchange oxygen and carbon dioxide with the blood.
Answer: Lungs
Words like signal come up in the daily game
One medical word a day, then a quick three-question quiz. Free on iPhone, or play in your browser on Android and computer.