Transcript 29.6 The Endocrine System and Hormones

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Cornell
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29.6upThe
Endocrine
System and Hormones
53
29.6 The
Endocrine System and
2.1 Atoms,
Ions,
•Topic: 29.6 The Endocrine and Molecules Hormones
System and Hormones
•Essential Question(s):
1. Create a double bubble
that compares the
endocrine system and the
nervous system.
KEY CONCEPT
The endocrine
system produces
hormones that
affect growth,
development, and
homeostasis.
29.6 The Endocrine System and Hormones
KEY CONCEPT
The endocrine system produces hormones that affect
growth, development, and homeostasis.
29.6 The Endocrine System and Hormones
• The endocrine system is a
collection of physically
disconnected organs
• Control growth, development, and
responds to your environment
29.6 The Endocrine System and Hormones
Try and come
up with 2
more
examples at
your table
• Ex: body temperature.
When you exercise you start to
feel warm. Your endocrine
system tells your body to sweat
more so you cool down.
•
•
•
•
•
•
Salt level
Blood sugar
Sexual development
Growth
Metabolism
Anything controlled by
hormones
29.6 The Endocrine System and Hormones
• Works more slowly than the nervous system.
– only chemical signals (hormones)
– signals move through bloodstream
target cell
hormone
bloodstream
receptor
not a target cell
29.6 The Endocrine System and Hormones
• Only cells with certain receptors
can receive the signals
• Works like a satellite system
• Sends signals in all directions,
but you need special receivers
to get the signals
29.6 The Endocrine System and Hormones
• Glands are organs of the
endocrine system.
– Glands secrete
hormones
29.6 The Endocrine System and Hormones
• Hormones are chemical signals or messengers that
influence cell’s activities.
– produced by glands
– travel through the circulatory system (blood stream)
– affects cells with matching receptors
target cell
hormone
bloodstream
receptor
not a target cell
29.6 The Endocrine System and Hormones
• There are many glands located throughout the body.
Hypothalamus: makes hormones that stimulate
other glands to release hormones
Pituitary: controls growth and water in blood
Thyroid: metabolism, energy levels, digestion
Thymus: helps white blood cells fight off infection
Adrenal Glands: breathe faster, increase blood
pressure- heart increases strength
Pancreas: Controls blood sugar by adding or
removing sugar from the blood
Ovaries and Testes: Cause sexual maturation,
influence sexual characteristics
– Hormones travel through the bloodstream to cells with
matching receptors.
29.6 The Endocrine System and Hormones
2)How does releasing hormones help glands to
communicate with one another?
• The glands are not connected. Releasing hormones
stimulate other glands to produce and release their
hormones.
29.6 The Endocrine System and Hormones
Hormonal imbalances can cause severe illness.
• Abnormal hormone levels affect homeostasis.
• Hormonal imbalances might be treated with surgery or
medicine.
• Steroids, a pituitary tumor, or some prescription drugs can
make the pituitary overactive and indirectly cause
problems.
29.6 The Endocrine System and Hormones
Robert Wadlow- (1918-1940)
•8 ft 11.1 in and 485 lbs
•Pituitary gland disorder- gave
him too much of the growth
hormone
•Used leg braces to walk, had
little feeling in his legs and feet
•Died at the age of 22 from an
infected ankle blister
Tallest man EVER recorded!
29.6 The Endocrine System and Hormones
Jon Brower Minnoch (19411983)
•Heaviest man ever recorded
•Peak weight 1,400
lbs
•Suffered from generalized edema
– his body retained massive
amounts of fluid. Over 900 lbs
was due to the fluid.
•Was hospitalized. Put on a strict
diet and dropped to 475 lbs
•Returned a yr later weighing 952
lbs
•They discontinued treatment
because his edema was incurable
29.6 The Endocrine System and Hormones
Quick
Includes
CNS and
PNS
Send
signals
Slower
disconnected
Respond to
stimuli
Connected Nervous
Endocrine
network
system
system
Controls
thoughts and
movement
Electrical
Signals
Maintain
homeostasis
Chemical
Signals
Controls
growth and
development