Hormones are chemicals released by glands in the endocrine system which circulate in the bloodstream and act as messengers affecting particular cells and organs.
ENDOCRINE SYSTEM: a system comprised of glands, which secrete hormones into the bloodstream to affect behaviour. From there, the hormones are sent to target cells by impulses which initiate specific responses.
Testosterone Testosterone is secreted by the testes in males and is mainly known for supporting male traits as it influences aggressiveness and aggression in general.
In males, it is responsible for factors such as:
The deepening of the voice
Facial hair growth
Increasing overall body mass and size of the male’s penis and testes.
Responsible for maintaining a male’s sex drive.
Increases the incorporation of amino acids & protein synthesis in muscles, liver, & kidneys, thus stimulating their growth & metabolism.
Essential for reproduction & maintenance of male characteristics, organs & behaviour
Supporting studies: Berthold (1849) Dabbs et al. (1995)
Adrenaline Secreted in the adrenal glands and is known for the "flight or fight" reaction and arousal. Adrenaline is a hormone that helps an organism deal with an external threat (in the environment) in preparing the body to fight it or run away. Adrenaline can increase flow of oxygen and blood to the brain (increasing activity in the heart and dilating blood vessels).
Some symptoms which adrenaline causes the body to do are: