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Girdling is the process by which bark is removed from the entire circumference of a tree or branch. Explain why a deciduous tree that is completely girdled in mid-summer can retain leaves throughout some or all of the rest of the growing season, but eventually die.
Adrenocorticotropic Hormone
A hormone produced by the pituitary gland that stimulates the adrenal glands to release cortisol, a stress response hormone.
Cortisol
A steroid hormone produced by the adrenal glands, often referred to as the "stress hormone" due to its role in the body's stress response.
Fight-Or-Flight Responses
A physiological reaction that occurs in response to a perceived harmful event, attack, or threat to survival.
Patellar Reflexes
A knee-jerk response triggered by tapping the patellar tendon, used to assess the nervous system.
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