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This document summarizes the hormones topic in the IGCSE course of two year. This document is useful for revising the final exams.

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Name:

Hormones
 You will learn what a hormone is
 You will learn why the adrenaline hormone is important




A chemical substance, produced by a gland, is
carried by the bloodstream which alters the
activity of one ore more specific target organs.
Once the hormone has been used, it is
destroyed by the liver.




Important hormones released
into the bloodstream into the
blood stream include ADH
(anti-diuretic hormone),
adrenaline and insulin.




 Its role is preparation for fight or flight.
 This means: an automatic physiological reaction to an event
that is perceived as stressful or frightening.
 Alternative name: Epinephrine
 Produced in the center (medulla) of the adrenal glands
Key actions:
 increase of heart rate
 increase of blood pressure
 expanding the air passage of the lungs
 decreasing the sensitivity to pain
 improve vision, hearing, and other senses
 slowing digestion
 alternating the body’s metabolism
 redistributing the blood in the body

Document information

Study
Secondary School
School year
3
Uploaded on
November 18, 2023
Number of pages
2
Written in
2022/2023
Type
Interview
Company
Unknown
Person
Unknown
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