Class Notes (1,100,000)
CA (620,000)
UTSG (50,000)
PSY (4,000)
Lecture 5

PSY290H1 Lecture 5: Hormones and Sex


Department
Psychology
Course Code
PSY290H1
Professor
brett Beston
Lecture
5

This preview shows half of the first page. to view the full 3 pages of the document.
Hormones and Sex
The Endocrine System
• The endocrine system links the brain to organs that control body metabolism, growth and development
and reproduction
• Its mode of communication is via hormones
• Hormones are chemical messengers that are released into the bloodstream or tissue fluid affecting
target cells some distance away
Three Major Classes of
Hormones
1. Protein and Peptides
2. Monoamines
3. Steriods
Two Main Mechanisms of Hormone Action
a) Protein Hormone Action
b) Steriod Hormone Action
8 Hormones Act on a Wide Variety of Cellular
Mechanisms
-A hormone may have different effects on each target, and act to coordinate different parts ofthe body 8
Hormones Act on a Wide Variety of Cellular Mechanisms
-One hormone may cause a response in more than one type of receptor
-One target organ may respond to several hormones—this is especially true in the brain
-A hormone may have different effects on each target, and act to coordinate different parts of
the body
“Master Gland”
Tropic hormones influence the release of
hormones by other glands.
Posterior pituitary: hormones synthesized in the
hypothalamus
Anterior pituitary: tropic hormones
Cyclic vs. Steady Gonadal Hormone Levels
Female hormones go through a 28- day cycle: the menstrual cycle.
Male hormone levels are constant’.
Anterior pituitary activity is controlled by the hypothalamus.
The hypothalamus determines whether hormone levels cycle.
You're Reading a Preview

Unlock to view full version