Transcript The Endocrine System - Freeman Public Schools

The Endocrine System
Lesson 6-3
Objectives
• Describe the endocrine system
• Identify hormones and their function in the
endocrine system
Bell Ringer
• Read Exploring Psychology p. 170
• Discuss adrenaline rush
Also caused by epinephrine
The Endocrine System
• Sends messages to and from the brain
– Called hormones
• Hormones produced by endocrine glands
– Carried in the blood
Hormones
Affect growth of body structures
Affects metabolic processes
Pituitary Gland
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Is controlled by the hypothalamus
Acts as the master gland
Secretes many hormones
Controls growth and reproduction
Thyroid Gland
• Produces thyroxin
• Too little-feel lethargic, gain weight
– Called hypothyroidism
• Too much- lose weight, can’t sleep,
overactive
– hyperthyroidism
Adrenal Glands
• Active when a person is frightened or angry
– Release epinephrine
– Causes heart rate and breathing to increase
– Generate extra energy for handling situations
• Also secrete cortical steroids
– Helps muscles to develop
Sex Glands
• Testes- in males
– Produce sperm and testosterone
– Testosterone decides sex of a baby
– Important for male secondary sexual
characteristics
Sex Glands
• Ovaries- in females
– Produce eggs and estrogen
– Regulate the female reproductive cycle
– Can cause hormonal changes that lead to
PMS
• Fatigue, irritability, and depression
Hormones Vs. Neurotransmitters
• Both affect the nervous system
• Neurotransmitter- released right beside the
cell that is to excite
– Fast acting
• Hormone- released into the blood and
spread through the body
– Slow acting