Brain Pop
• How many different hormones do the endocrine glands make?
• Which glands are different in males and females?
• When is adrenaline released?
• What is type I diabetes?

The Endocrine System
Made up of:
1.
Glands that secrete hormones
2.
Organs that have hormone secreting cells

Function of The Endocrine System
1.
Regulates metabolism, growth, and mood
2.
Maintains homeostasis
3.
Establish circadian rhythms
4.
Responds to stress

Endocrine Glands vs Exocrine Glands
Exocrine Glands
• Secrete products into ducts that go out of the body
• E.x.
Endocrine Glands
• Secrete hormones in the body which diffuse into cells or organs

The Big Idea
• Hormones are chemical messengers that act on target cells (or organs)
• How does the endocrine system communicate with the body?
http://educationportal.com/academy/lesson/hormo nes-definition-function-intro-to-theendocrine-system.html#lesson

Endocrine Glands
• Pituitary
• Makes hormones that control other glands
• Thyroid
• Controls metabolism and rate at which cells burn fuel
• Parathyroid
• Regulate the level of calcium and phosphorous
• Adrenal
• Control fight or flight response, anti-inflammatory response and regulation of salt and water

Endocrine Glands
• Pineal Glands
• Control your circadian rhythm
• Hypothalamus
• Links the endocrine glands and the nervous system
• Thymus
•
Helps fight infection with the aid of T-cells.
• Pancreas
• Maintains a steady level of glucose in the body

Endocrine Glands
• Ovaries
• Found only in women
• Responsible for regulating menstruation and for secondary sex characteristics
• Testes
• Found only in males
• Responsible for secondary sex characteristics

Hormone Action
• Hormones act on specific target cells.
• How?
• Target cells have hormone specific receptors

Hormones Respond Differently to the same
Receptor
Why?
• Receptors are in different locations
Lipid-soluble
• Receptors located inside target cell
Water-soluble
• Receptors are part of cell membrane

Water soluble vs Lipid Soluble

Hormone Action Analysis
5.
What’s a gland? What’s a hormone? How do glands and hormones work together?
6.
The body makes more than 20 hormones, each with a specific function. How is it that hormones know exactly which tissues and organs to communicate with? Describe the process.

Regulated by two systems
• Sleep/wake homeostasis
• Circadian rhythm
(biological clock)
• Which hormone is associated with sleep?
Sleep
Sleep needs
• Based on age http://www.youtube.com/watch?v=jF fAbMbrZrA http://www.youtube.com/watch?v=U bQ0RxQu2gM

Circadian Rhythms
• What do circadian rhythms regulate?
• When does the strongest sleep drive occur?

Circadian Rhythms
• When do the strongest circadian “dips” occur in teens?
• What does this result in?
• What is the
Suprachiasmatic
Nucleus?

The Pituitary Gland
Divided into two lobes
1.
Anterior
• Synthesizes and secretes hormones
2.
Posterior
• Contains axons and axon terminals
• Stores and releases two hormones

• Butterfly shaped
Thyroid Gland
Hormones control
• Basal Metabolic Rate
(BMR)
• Normal body temp

Parathyroid Glands
• Contain cells that release parathyroid hormone
• How many do we have?
• Four

Pancreas and Adrenal Gland
Pancreas
• Has both endocrine and exocrine functions
Adrenal glands
• Divided into adrenal cortex and adrenal medulla

Ovaries and Testes
(AKA Gonads)
Ovaries
• Produce eggs
Testes
• Produce sperm

Nervous System Vs The Endocrine System
Nervous System Endocrine System Characteristic
What the system uses to communicate with the body
(Mediator Molecules)
Where the communicate occurs
(Site of mediation)
Types of Target Cells
Time of onset of action/response
Duration of action/response